[BIGBLOCK70Z]

OK my 70z is an lt1 and came with the tall spoiler. when i put the new quarters on the holes for the end caps were huge, i put a one piece spoiler back on it and still have the tall three piece. the end caps have part numbers of 3990475 and 3990476 they have also have diamond shaped markings on them that (pos 1) any help i will appreciate.

[1972lt1]

What's your ? If you're looking for info on second gen Camaros go to www.nastyz28.com Are you looking for parts? Installation help? I'm looking at the part #'s for the end caps in the factory assembly manual I have for my '72 they are the same, the part# for the center section is480161. The holes in the fender (2 per side)should be 29/64" the ones in the trunklid (8 of them) should be 3/8". Hope this helps.

[BIGBLOCK70Z]

3990475 3990476 are the part numbers on my spoiler end caps. the holes in my quarters were big enough to put you hand in. when i put the quarters on i welded them up and put one piece on it.

[Z15CAM]

I believe you must be referring COPO Rear 3 Piece Spoiler for the 70 to 73 Camaro. These did not come on the 70 model unless you ordered it separately from GM via your Dealer. The 70 Camaro could be ordered with the one piece spoiler which I believe is the same as the 69 part. You are right about large holes in the rear quarter panel to mount the ends of the 3 piece COPO Spoiler. Remember these holes had to be made by the installer as they were not present on the car from the factory. Because of the angle of the mounting studs on the end pieces it is not unusual for the side hole to be the size and shape of an egg.

[BIGBLOCK70Z]

Yes the 70 came rpo with the short 1 piece, but because of scca rules in order for chevrolet to use the tall 3 piece they had to be an option for the 70 z. so they had to mass produce so many and ship to dealerships for the trans am race cars to have them. my car came with the tall spoiler and i am just wondering if all of them would have been copo's, my car was built 06 b june second week the order came from chevrolet i herd sometime in late april or may. i still have the tall one but not sure if i want to drill new holes.

[Z15CAM]

I bought my Z in 76 and being from the north the salt had eaten the rear lip seal of the trunk lid; so rather then patch, I used a trunk lid from a mid 70's T/A. It was a perfect match and the spoiler holes were position correctly for the tall 3 piece spoiler I had. After painting the car, I discovered that I forgot to locate and drill holes for the rear deck emblem signifying "CAMARO by Chevrolet", which is specific to the 70 Camaro. Since I trashed the original trunk lid I don't know where to position the emblem, I got the emblem in the glove box and hope someday I see another 70 Camaro to note the correct location for the emblem. It looks like we are both pondering the idea of drilling more holes in our 70z - lol

[BIGBLOCK70Z]

Me Too.

[Z15CAM]

Johnnie: It’s been along time since I refurbished the trunk lid and installed the 3 piece COPO rear spoiler on my 70 Z but if memory recalls I did replace the lid with one from a 74 Firebird. My Z came with an mocked 3 piece COPO spoiler as the end pieces were from a later model with clearance cut for the different rear panel and tale lights. If I recall someone had drilled the original lid to accept the tall spoiler but the factory holes were there for the lower RPO one piece spoiler suggesting that the holes are in different locations. The rear quarter side panel had egg shaped holes drilled to accept the angle fit of the end pieces. I believe, I replaced the trunk lid and center section of the COPO spoiler with the one from the T/A and ordered the correct 70 to 73 Camaro COPO end pieces to complete the job. The Firebird center section aligned perfect with the Camaro end sections but I believe I had to sand about a 1/8th inch off the top as it may have been somewhat taller. I can not say that the holes in the trunk lid from a later Camaro match the holes of a Firebird sporting the COPO Spoiler and I’m sure that the location holes for the Lower RPO Camaro spoiler do not match the holes for the higher COPO 3 piece spoiler on the 70 Camaro trunk lids as I believe the COPO spoiler Option was not offered as a RPO item until 71.

By the way the rear deck cowling directly below the rear window that covers the lid's torsion springs from the Firebird fit my 70 Camaro.

Hope this gives you something to work with.

Ron

[BIGBLOCK70Z]

the holes in the deck lid are different from one to the other. but in 70 you could get a car with a tall spoiler 3 piece. they called it copo. i was just wondering if all of them were (the 3 piece) copos for 70

[Z15CAM]

I've personally never saw, read or heard about a Tall One Piece COPO Spoiler. I do not believe you could order a Camaro with the Tall 3 piece COPO Spoiler Option until 71. Prior to 71 you had to order the Item from GM through a dealer. As the 70 trunk lid was drilled and bracketed for the lower RPO Spoiler (same as the 69 spoiler) you had to drill new holes in the trunk lid and in the rear quarters for the end pieces if you installed the 3 piece COPO Spoiler. Camaro Trunk lids and rear quarters, after 1970, had the appropriate holes for the 3 piece COPO spoiler only if the car was ordered with a Spoiler. In 71 the lower one piece spoiler was no longer an option. So you could say that the Lower one piece Spoiler was superseded by the taller 3 piece COPO Spoiler in 71, but in 71 the “Camaro by Chevrolet” rear deck emblem disappeared.

A 70z28 never came with the Taller 3 Piece COPO Spoiler unless you ordered the Item separately. The COPO Spoiler installation is an acceptable add on to the 70 z28 and does not reduce the value of the original z28 package as the Item was available from GM.

I remember looking at a 69 Camaro 396 RS/SS Convertible on a showroom floor and it came from GM to the Dealer with Headers in the trunk. About a week later I saw the car on the road and had to have a closer look at it. It took all the power my 63 2 dr Sedan Pontiac 327 6 Pack could dish out before I put that Camaro in its place; guess he hadn’t installed the headers - lol

[BIGBLOCK70Z]

hey tiny, i am trying to send you the article from my dealership from 1970 it wont go through, email me and i will send it in reply.

[RamAirDave]

This thread covers a lot of the info about them:

http://www.nastyz28.com/forum/showthread.php?t=33134

[Z15CAM]

Johnnie: Sorry about the defunct E-Mail but I resonantly moved and don't have POP
Service anymore; however, I just reactivated my old Hot Mail Account:

Tiny_Mud@hotmail.com.

After a follow up to Dave's Links, I'm puzzled were this thread is leading. I get the
impression that people are trying to determine or say that 70 COPO z28's exist based
on the fact whether the COPO 3 Piece Spoiler could be ordered as an installed item
from the factory prior to 71 or 71 1/2 whatever.

If one can convince the establishment that a handful of 70z 28's were indeed COPO's
based on this theory then all the more power to them ))

The concept seems hilarious to me; but I guess it's about time Camaro Dudes start
accepting the fact that the 70z28 is very rare as only about 8500 of them were built.
I know mine is less then one of 1600 built with the options it came with:
Power Steering and Brakes, Hide-Away Wipers, Console, M21 and 4:10 posi
12 bolt which is very rare as they came STD with 3.73’s, F3 Glass Tint - not sure
about the rear defogger though.

[BIGBLOCK70Z]

mine is pwrstering brakes 4spd lt1 12bolt 4.10.s tach 6500 console hide wprs three piece spoiler only chrome was around head tailights and windows.

[Z15CAM]

John: Seems we have the identical car. I don't remember the Build Date on mine as it's presently under a tarp for the winter and can't get at it to find out. I do know mine is a Norwood assembly and I believe it has the Dark Green 723 Trim and either the Citrus Green 43 or the Forest Green 48 Paint Code. Mine also has no Extra Chrome and did not come with Rain Gutters. The interior is very plain Jane with no wood Grain; however the Dash Bezel is Wood Grained Sporting a 130mph Speedo and 8000rpm Tach Redlined at 6000rpm.

When the weather gets better I'll check out the build date and compare it with yours; maybe our cars were on the assemble line at the same time.