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View Full Version : problem with eng mounts - '69 307 in a '79 Camaro


calflan
01-09-2005, 01:27:00 AM
I am having a time mounting a 1969 307 in our 1979 Camaro. The Camaro had a 305 with the steel plate (cup shaped) mounts on the engine. The body has the rectangular mount with the rubber insert insdie. The body mount has 3 bolts in an 'L' pattern, not a 'T' pattern, I believe same on all second gens. The 305 that came out had a shim on the left side of the engine between the engine block and the mount. I isntalled the shim and the hard mount on the 307 block and installed new body mounts. Cannot for the life of me get the dang block mounts to line up with the body mounts. I took the shim out, but all still looks as though it's about a 1/2 - 1 inch off on one side, when I can get the other side bolted into the body mount.

I have tried, finally, mounting one side up then mounting the opposite side to the engine and tried to istall the body mount bolts afterward. This does'nt work either.

Is there a different mount I need to be using or some trick for putting the '69 307 in the '79 chasis ?

The 307 came out of a Chevelle and I believe the mounts for the Chevelle are somewhat more of a 'T' pattern and different looking mounts altogether than the F-Body.

I thought all small block chevy's were the same as far as install, although I know there are different style mounts.

HELP ??!! please.
Thanks guys.

Eric
01-09-2005, 02:04:00 AM
You have one or both of the engine mounts on the frame upside down (i.e. turned 180*) which can/will cause this sort of issue. Why was there a shim on the 305? Is it possible the block-side mounts are not correct for a SBC and were borrowed from something else? Or, was this done to compensate for something like frame misalignment? Measure the frame rails on the front subframe at the front and at the rear and make sure everything is straight.

calflan
01-09-2005, 10:08:00 AM
The frame mounts are the same dimension either way, in comparison (looks like anyway). I compared the mounts removed because I thought maybe the same, but can't see any difefrence if they're mounted as they are or 180 from as they are. I have not tried rotated them though, so maybe I'm just not seeing it.
Where exactly are you talking about to measure ? Not sure what you mean by frame rails. Do you mean on the subframe from the base to the mount holes on each side, and the same from top mount holes to top curve of subframe ?
As far as compensating, don't know the history on the engine install on this car. I THOUGHT it was the original engine and can't see any signs that it is not.
Thanks for the help.

[This message has been edited by calflan (edited January 09, 2005).]

[This message has been edited by calflan (edited January 09, 2005).]

Mwilson
01-09-2005, 10:14:00 AM
I put a 72 350 in my 68ss396 chevelle
and i had to buy new mount for the engine for a 68 smallblock chevelle

------------------
14.22 on the brakes (I expect 13.90's soon)

mjoc
01-09-2005, 04:50:00 PM
the 307 has a diffent motor mount that connects to the block compared to a 350 I don't know why but I had this problem a few time...

calflan
01-09-2005, 05:47:00 PM
mjoc - what did you do ?
Are there other mounts that can be used in this ?

[This message has been edited by calflan (edited January 09, 2005).]

1981coupe400ci
01-09-2005, 09:15:00 PM
i had a 307.. i used engine side mounts i used on a 350 originally... i used 1981 Z-28 frame side mounts from A/Z..the 350 engine side mounts bolted right to the 307.. and the 307 dropped right in.. only took about 5min to drop the engine in and line the holes up to slide the long engine mount bolts in...

best thing to do is use the 305 mounts on the 307... since your swaping a SB for SB all the mounts should bolt up from the 305 to the 307

calflan
01-10-2005, 01:41:00 AM
The 305 mounts just flat out don't line up. We tried every combination there is, swapping side to side, checked the frame mounts, etc. The frame mounts are the same Part Number, as are the block mounts. They are identical, so whichever side they're put on really does'nt matter. I took out the shim between the left side mount and the block and got a bit closer, but if I get one mount bolted or even put an awl in to line it up, the other side is still at least full hole off from matching up. I've changed a few engines and have never had the pain this miserable setup is giving me. As you said they are small block chevy's and everything SHOULD be interchangeable. For the life of me, can't see why this would be such a problem. Don't know why that shim would be installed on the left side either. I'm afraid not to put it back in, for concern that the tranny driveshaft may not end up true without that engine alignment (far off thinking ??).
Anyway, I'm really begining to think there is either a kit to do this or the match ('69 307 in a '79 Camaro) can't be done.
One thing I will say, I am trying to mount the engine with tranny installed on the engine altogether and that should not be a problem either. Have done that before. Not long ago installed a 350 in a '77 that had a 305 and it was a pice of cake, as said, went in, in about 10 minutes tops. Something is differnet with this 307 in the '79 setup.

Anything else anyone can offer is gladly accepted.

Thanks again guys.

[This message has been edited by calflan (edited January 10, 2005).]

night rider
01-10-2005, 02:44:00 AM
Shouldnt be nothing diff at all. The 307 block mounts may be diff than the 79 mounts. Use the block mounts of the 79 305, and the frame mounts thats in the 79.

No swap kit needed for that engine swap. Any gen 1 engine will fit into just about any chevy car/truck with out a "kit"

Your 69 307 and 79 camaro is no diff.

I put a 62 326 in a 73 c-10, and 84 camaro
69 327 into a 84 camaro and 82 firebird
71 350 in a 88 camaro
76 van 350 into a 78 camaro

They didnt come shimmed, I wouldnt re use the shim myself.

With the tranny bolt on shouldnt give no trouble, but some times the extra lenght/weight will cause engine to try to sit down alittle cocked to the side.

Have 2 people, one guiding engine, and other person slide under the car and grab the tranny tailshaft and pull/push/lift it, and have the person guiding the engine tell you if it's making it better or worse.

The engine has to sit down level or you'll never get the mounts to line up

[This message has been edited by night rider (edited January 10, 2005).]

mjoc
01-10-2005, 03:28:00 AM
I didn't change the block mounts they are the same. The one that is bolted to the 307 needs the motor mount bracket (I guess we will call it that) is a 307 design only go to your local parts house and ask for a 70 307 camaro mount or 70 307 chevelle mount. that will work fine. Because the mounts welded to the subfame are the ato 81 if not mistaken

calflan
01-10-2005, 06:02:00 PM
MJOC - Have foun d what you are talking about. The block uses MOUNTS on this engine, while the chassis needs brackets. On the 305 and others, it's vice versa - block uses the clamshell brackets, while the chassis uses the rubber mount. The block mount is same for '70 - '73 Camaro's with 307 or 327. Am I to understand you in saying the subframe brackets are welded to the chassis, not bolted ? Do I have to modify (weld in) the subframe to get the chassis bracket for this engine ???
I can't locate any brackets. Chevy does'nt make 'em anymore and Year One, Classic, etc. all do not sell them either.
UUUUUUUUGGGGGGGHHHHHHHHH !!!!!!!!!!!
Gettin ready to try to trade this engine for an easily installed 350 !!!!!

What do you mean by this - "Because the mounts welded to the subfame are the ato 81 if not mistaken" - is the ato 81 the bracket model or Part Number ?
Thanks for the help.

[This message has been edited by calflan (edited January 10, 2005).]

73454
01-10-2005, 06:18:00 PM
You say you replaced the subframe side of the mounts. It sounds to me like you used the inline 6 mounting locations for the subframe side of the mounts. I would re-check those before I went any further. I know it is damn near impossible to measure the distance between the engine brackets (engine is in the way!) but you can get pretty close if you try.

calflan
01-10-2005, 10:09:00 PM
I installed the subframe mounts in the same places they were when the 305 was installed.