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Old 04-04-2006, 10:29:48 PM   #16
Baseballstud
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i did my whole swap for less than $1000. Got a wrecked cop car with low miles and disassembled it.. use the ac delete bracket and your pretty much good to go. definately buy the wiring for 500 it will save you alot of hassle, and no their is no difference between the lt1s you could mount a t56 to an impala or caprice engine.
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Old 04-07-2006, 07:01:24 PM   #17
sbca96
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Quote:
Originally Posted by Ceth
can I take the 4th gen driveshaft and bolt it up, or do I have to shorten mine???

From what I read a mid 80's 2wd Blazers driveshaft is exactly the right length
for the swap of an Lt1/4L60 combo. I got one from a local salvage yard for
about 20 bucks. Sure beats paying to have one cut and balanced. I think I
read it on here somewhere about the required length.

This is for my wifes 78 Camaro, we bought a wrecked 94 Firebird, which will
be giving up its seats and etc also, has 67,000 miles on it, and she paid only
2300 bucks for the whole car. Runs nice. So far the only holdup is getting
the 94 into the backyard to strip. We have the Painless kit, and A/C delete
I found a cheaper alternative to the now discontinued Corvette bracket on
the Avanti website : http://www.bowersrodshop.com/home.htm. I contacted
the maker of the bracket and it WILL work with the factory A/C delete pulley.

The only real issue that I need to overcome is the exhaust, the LT1 has "D"
port exhaust, the stock 4th gen manifolds supposedly dont fit. I also need to
be smog legal, so the rest of the exhaust is up in the air too. I have thought
about using a single CAT like the 94/78 with the 3 inch single exhaust to the
muffler then split at the rear. What have others done??

Tom
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Old 04-11-2006, 04:44:08 AM   #18
Ceth
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Hey im in CA too, and I need to keep smog legal as well. If its a 94, how are you putting dual cats on? I know the 94 is a single cat, are you basically reprogramming the computer to work with two cats or what? I dont know much about fuel injection and computers. Ive been looking for lt1 prices around here in orange county and I dont like what im seeing. One wrecking yard told me $2500 for a lt1/t56 combo. Yuck.
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Old 04-12-2006, 08:30:50 PM   #19
sbca96
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Quote:
Originally Posted by Ceth
Hey im in CA too, and I need to keep smog legal as well. If its a 94, how are you putting dual cats on? I know the 94 is a single cat, are you basically reprogramming the computer to work with two cats or what? I dont know much about fuel injection and computers. Ive been looking for lt1 prices around here in orange county and I dont like what im seeing. One wrecking yard told me $2500 for a lt1/t56 combo. Yuck.

The dual CAT setup would be like the Impala SS, but I think that a single CAT
is easier to do, and they proved back with the IROC that single exhaust CAN
make nice HP also. I figure a split behind the rear axle and all is well. I dont
think you need to reprogram for dual CATS, if you use the Impala SS ones. It
is a smaller CAT then the single one on the 94. I wouldnt go to a salvage
yard myself, they WILL over charge you. I went that route YEARS ago with a
700 R4 trans and still regret it today (lucky I got "yard credit"). Your best
bet is buying a whole car, preferably wrecked. The T56 ones will cost more
then the 4L60s. I know that the draw of the T56 is great, but the 4L60E IS
a very nice trans also, and MUCH easier to install. Check www.recycler.com
DAILY! Thats where I got the 2300 Firebird!

Tom
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Old 04-13-2006, 01:39:11 AM   #20
Ceth
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Yeah $2300 is good, but hopefully I can get an engine/tranny combo for a bit less.
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Old 04-13-2006, 02:59:18 PM   #21
sbca96
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Quote:
Originally Posted by Ceth
Yeah $2300 is good, but hopefully I can get an engine/tranny combo for a bit less.

For only 67k miles .. I think 2300 for a whole car was great! We bought it
two years ago even. I think that even with the current prices, 2300 is a
really good deal. If you have a place to STORE the parts car, then its best
to get the WHOLE car, since you will have the radiator and other items that
will ease your install. Not to mention the seats, and other goodies like brakes
and so forth. I have read about more then a few people installing 4th gen
rear discs on their 2nd gens .. thats what I will be doing also.

Tom
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Old 03-15-2009, 02:21:58 PM   #22
BrianMassie
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A quick word about emissions legality with swapping LT1s. When using the B-body version, the GM Serice Bulletins state that AIR pumps are no longer required on these engines. What does this mean? Headers, twin cats, H-pipe, and true duals all the way back w/o a smog pump. Life is good.
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Old 03-15-2009, 09:11:48 PM   #23
sbca96
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The smog pump only runs for the first few seconds the engine is started, so
its not really doing a whole lot anyway. I dont think you are going to see a
huge difference in anything with it gone.

I cant stand reading this thread, since the Firebird is still sitting in the back
yard, the 78 is still sitting in the front yard, and I am no closer to getting the
two mated. I have pretty much everything to do it, but was hoping for the
gas tank option to open up. In the time between purchasing the Firebird and
now, we totalled my wifes '95 Camaro, which I have paid storage on for the
last 6 months. I find it hard to believe it hasnt sold, but everyone is fearing
being laid off and not spending money.

I hope that 2009 is the year that the engine swap happens.

Tom
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Old 03-15-2009, 10:08:21 PM   #24
drptop70ss
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The LT1 swap can be done reasonably cheap, all depends on what donor car you use. I would get an M6 F body and use the engine, trans, radiator, fans, fuel lines, wiring, and whatever else you can, then sell of what is not needed. That is what I did with my 65 olds, and after selling off the unneeded F body parts the cost of what I used was minimal. F body parts are worth much more than B body parts and the B body's are all automatics...so if you want a T56 look for an F body. If an automatic is ok then by all means grab a B body if you can find one cheap. Everyone bad mouths the opti but really they should last 100k miles so you replace it once and forget it, same with the water pump, it was designed to go 100k miles. Also the opti is a pita to change on the F body because of the tight engine compartment, when the engine is in an older car it really isnt a big deal.
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Old 03-16-2009, 12:08:22 AM   #25
sbca96
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Side note on the B-body .. there was a L99 also in them, this looks like an
LT1 but is actually only rated at 200 hp. Its a 260 cu in version. You need
to look at the VIN and confirm that its got an LT1.

In my experience the Opti goes at least 150k, my Impala made it to 172k.

Tom
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Old 03-16-2009, 04:56:21 PM   #26
RaycerX81
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Quote:
Originally Posted by BrianMassie
A quick word about emissions legality with swapping LT1s. When using the B-body version, the GM Serice Bulletins state that AIR pumps are no longer required on these engines. What does this mean? Headers, twin cats, H-pipe, and true duals all the way back w/o a smog pump. Life is good.

actually it can only be disabled, not removed. It still has to be in place for Cali emissions. Also you have to have the computer programed for it otherwise it throws the check engine light.

As for the Opti, there are several aftermarket versions. my Impala still has its original one at 130k and almost 12 years old.
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Old 03-17-2009, 02:00:07 PM   #27
91chevywt
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An LT1 swap can get done really cheap if you want. The biggest difference between an LS1 and LT1 swap is the initial investment. If you can bear to search for a while you can get a good running engine, transmission, and ecm/wiring harness for about $1000. If you keep everything stock, you basically have it all right there. Shortening a driveshaft is cheap. If you look around buying the same thing except with an LS1 will be at least $500 more.

I did a LT1/700r4 and since I ended up doing a total engine rebuild it put me in the $3000-$4000 range, but i have a brand new engine basically.

So, its all about what you want to spend. I'd say the cheapest realistically is around $1500 once you include all the nickel and dime stuff.
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Old 03-30-2009, 02:32:02 AM   #28
BrianMassie
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You don't have to reprogram the computer, at least according the the TSB. All that is required is removing the relay that controls the pump and the rest takes care of itself. I live in Virginia, so being that the car is an 81, all I really need are converters. I could probably ditch the EGR and be fine. Once the inspector pops the hood and sees the fuel injection, he'll probably forget all about looking for an EGR valve. :-)

Last edited by BrianMassie : 03-30-2009 at 02:34:09 AM.
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Old 04-10-2009, 12:40:12 PM   #29
Mugbie
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I'm in the operation of swapping an LT1/TH400 into my 80 Formula. I still gotta plumb the fuel system, have fun with all the wiring, and chase down any other gremlins that I encounter. Here's a short list of parts I've bought so far.
LT1 engine/wiring harness/ computer - 500$
Hedman Hedders longtubes/65104 - 215$ shipped from Jegs
Motor mounts/motor brackets - 28$
Flexplate - 51$
BOP to Chevy trans adapter plate- 50$
O2 bungs for headers- 12$ shipped from Jegs
New LT1 radiator- 137$ shipped from Rockauto
AC delete pulley - 30$
Home made CAI - 13$ got parts from Lowes

I used a BOP TH400 so I had to get an adapter plate and
I have to get a different converter so if you go with a
chevy th400 you will save money here.

I'm still looking to spend about another 500-700$ completing
this swap. In my opinion this is one of the best swaps to
do for the money, and it's pretty cool and I think more
unique than the LSX swap.

All in all after I've bought all these parts and sold the
previous engine and various other parts I only have
like 300-400$ invested in this swap so far.
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Old 04-12-2009, 11:03:57 AM   #30
130fe
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Thumbs up

I will be selling my lt1/4l60e setup complete with painless harness, street and performance accessories and much more to drop it in to your car. The engine has a GM hotcam with 10k miles on the motor and tranny. Nothing wrong with it, I am going to an LS3. I want 500 RWHP instead of 300. It gets 18MPG in town and 22 on the highway with 3:73's. It will have almost everything except for the fuel system (car portion). If interested pm me. Pictures are below.

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