74 Owners

[rwinkles]

Originally Posted by 74 Z28 dude

Great looking car! I never got the 'ugly' point of view, but of course I have always liked them. A recent question has been raised on this site regarding the presence of both the fender Z28 emblems and the hood graphics(stripes). Did yours in fact come with both? Thanks and welcome!

My car did in fact come with the fender emblems and the stripes. I bought the car off the dealer lot, there were several other cars there at the time (early October 1973) but mine was the only one with the stripes. Another guy in school bought a white car a month or two later that did not have the spoilers (yuk!) but it did have the stripes. That car did not have the fender emblems and he was not happy about it. He later added them. My car was built September 9/10 1973 so it is a pretty early car (9033rd Camaro built), maybe they screwed up, maybe they added the stripes later, I don't know.

[CamaroNmotion]

Hey Dick, welcome to the site! Greeting from Buffalo. I knew right away who's car this is when I saw the picture. You'll enjoy this site alot, I check it daily. The original drivetrain topic is full of useful information to keep our cars original looking. Pete

[CC 74 Z/28]

Super Nice original. You've joined the best site on the internet for second Gens.
Welcome

[mssl72]

I had a couple of questions for '74 owners. Does anybody know if GM used the letter "I" in date coding alternators in the '74 model year (my early copy of Chevy By numbers says they did)? Also Z28 owners, what alternator did your car come with, 1102397 37 amp or perhaps 1100950 42 amp? I recently started digging into my '74 Z looking at numbers and date codes to see what was what. My car has a 3L5 dated 1100950 which would be fine dating wise IF GM did not use the letter "I". My car was delivered in November '73. Just wondering what other original cars have in them. Thanks guys. Oh... and gals too!

[74 Z28 dude]

My copy of 70-75 'Chevrolet by the Numbers' circa 1994 by Alan L. Colvin chapter 14(p.223) shows no 'I' as an alternator month code. Your altnernator # of 1100950 shows as a Corvette 71-75 part. In 75 it does show it to go on the L82 Corvette. But not correct for an L82 74 Z28. Does anyone know of an 1102397 alternator for sale? I've been looking for three years now! I know it is correct for the 74 Z28 because I saw it on the GM Heritage Collection 74 Z28 this summer. The only one I've seen.

[CamaroNmotion]

I'm an original owner of 74Type LTZ28 which still has the original alternator in it. 1102397 is the number and it is rated for 37 amps...the 37A is stamped onto it. My car was built 2nd week in 74 and this alternator part number does not show up in the 74 Chevrolet Pass. service & overhaul manual, however this number is listed in the 75 Pass. car service & overhaul manual supplement. Hope this information helps.

[74BIBELOT]

Hey guys, is this your engine? (short block) "14N127437''
http://cgi.ebay.com/ebaymotors/1974-...QQcmdZViewItem

[mssl72]

Thanks for the reply's guys.

74 Z28 dude: You must have a later revision of Chevy by Numbers. Mine shows the "I" was used for a month code. I found that they may have dropped using the "I" in 1964-5 time period. On one of the last pages in your book, you may find a revision page that will show you what was changed from the first issues. What alternator is in your car now?

So, since the "I" wasn't used that would make the alternator currently in my car (1100950) fall in line with the rest of the build/production dates for my Z. It would be a November 5, 1973 build, 3 days after my engine assembly date.

CamaroNmotion: You said your car has a body build date of 01b (on cowl tag). Was the date also January 1974 (on your blue VIN label)?

So, far only one person has replied that has an 1102397 in their '74 Z. I wonder if... wait a minute... I'm reading something ... OK, I just found something very interesting in my assembly manual. This makes some sense now! If you have a '74 assembly manual check out page 6Y 2 (approximately page 176). This is the page where they talk about the "Generator" installation. I never really looked at this before. The alternator is item 13 in the parts list. They show 2 #13's on the list. One is 1100934 (37 amp), 350 excluding Z28. The other is the 1102397 (37 amp) for Z28. Just to the left of the 11002397 part number are the numbers 2 and 3 in circles. Those numbers in the circles are revision changes for that part. At the bottom of the page towards the left is a small chart that has a column labeled "Revision Record". Revision number 2 is dated 5-25-73 and says "WAS 1100597 & Z28 WAS K76". The K76 reference is the RPO number for an optional higher amp alternator. The 1100597 was used on Camaro's (maybe others) during the 1973 model year. It was a 61 amp alternator. Having a rev change date of May 5, 1973 means that this was early in the planning stages for the 1974 model year. Revision number 3 is dated 10-10-73 and says "1102397 WAS 1100950".

Early plans called out the same number as the '73 Z's, maybe only because they just needed a part number on the drawing to get it done. The earliest date on the drawing looks like 1-17-73 (it's a little hard to read). So they used that number until May 5, 1973 and then changed the part number to 1100950. Then on October 10, 1973 they changed the part number again to 1102397. That was well into production already and would mean that early Z28's (maybe 1st half of production) had 1100950's installed in them and they slowly used them up in production until the 1102397's were ready. CamaroNmotion's '74 Z has the 1102397 in it and he has a January, 1974 build. I have a 1100950 in mine and have a November, 1973 build. I noticed that the amperage ratings dropped every time they changed a number. The 1100597 was 61 amp, the 1100950 was 42 amp and the 1102397 is 37 amp. I wonder if they may have done that to get ready for the soon to be installed HEI system, which might not require as much power. So all that being said and read, it looks like '74 Z's could have had 2 different alternators.

74 Z28 dude: What is the build date on the "GM Heritage '74 Z"? I hope you looked.

I think I'll have to dig into my assembly manual more often!

[74BIBELOT]

Hey Mark you're right!!!
Maybe your assembly manual is a bit clear than mine.
Look here...http://www.nastyz28.com/forum/showth...ght=alternator
From 74 assy manual.

[74 Z28 dude]

Mark
Excellent research! I will look closer at the 74 assembly manual. Sorry, I did not take note of the date code. That would have been a great piece of information. I was focusing on taking as many digital pics as I could of the GM Heritage Collection 74 Z28 given the lighting conditions in the engine compartment. I don't have either alternator part #
Mark '74 Z28 dude'

[mssl72]

Mark,

Here's a macro from my assembly manual.



I take it that the "Heritage" '74 Z is in the GM Heritage Museum that's not open to the public. Is that where you saw it? You should post some pictures of it.

What alternator is currently in your car?

[CamaroNmotion]

My opps! Car was built in 2nd week of Feb.74. Blue tag says same.

On another note master cylinder bail wire for 74 had id sticker with letters CS in red written on it. Does anyone know if this was on other years too?

[mssl72]

Originally Posted by 74 Z28 dude

...I know it is correct for the 74 Z28 because I saw it on the GM Heritage Collection 74 Z28 this summer. The only one I've seen.

So where did you see the "Heritage" '74 Z??

[74 Z28 dude]

I saw the GM Heritage Collection 74 Z28 at the 'All Camaro and Chevy Show' sponsored by the Pacific Northwest Camaro Club, in Issaquah Washington state. Scott Settelmire of GM Performance Division hand picked the vehicles to be brought out from Michigan for the show. It still sports the original tires! I'm sorry to say that I had to wipe my hard drive clean and lost the stored digital pics. I only have prints now. But I am willing to look at any details one of us may have a question about. Just let me know! However I too still have unanswered questions regarding 74 Z28's.
Mark

[nagr]

Hallo guys! My name is Nikollas and I'm from Brazil. 6 months ago I finally bought my first Chevy, a 74 Camaro, after some years with Mopars. My car is pretty much the same of Mike's (mssl72), of course not in the same condition, but is still a complete matching numbers car. By the way, I would love to get more pics of Mike's car to help me with my restoration. Is Mike reading this?

There's something special about that Camaro year. For me, one of the most beautiful ever made. This topic is a very good idea. I will count on you for all my doubts and problems.

Here are some pics of my car, the gold one. The blue is from a friend, who even has the original painting.