C-4 top differences

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Dec 15, 2009 | 08:53 PM

jrd1990zr1

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From: Delanson New York

C-4 top differences

I understand 3 styles of top were used on a C-4 coupe; 84 to E86, L86 to 88 and 89 on.

Does anyone know what the differences are? Is it distance on front attachment or something more. Any one know a website that explains the differences?

Thanks,

Dec 15, 2009 | 08:56 PM

LT4 F45

Burning Brakes

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From: Montreal Quebec

distance between front attachment but i think 86L-88 and 89-up are interchangeable...

Dec 15, 2009 | 09:02 PM

Goldcylon

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From: Peoria Arizona.. Resident Gold Cylon

From Ecklers. Best quick visual of the difference in the mounts

Last edited by Goldcylon; Dec 15, 2009 at 09:04 PM.

Dec 15, 2009 | 09:04 PM

chuck13

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From: been there done that

yes,the front attachment is different,otherwise they
are all the same

Dec 15, 2009 | 09:06 PM

chuck13

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From: been there done that

Quote:

Originally Posted by Goldcylon

From Ecklers. Best quick visual of the difference in the mounts

dammit!i was lookin for that and could'nt find it!

Dec 15, 2009 | 09:07 PM

jrd1990zr1

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From: Delanson New York

Quote:

Originally Posted by Goldcylon

From Ecklers. Best quick visual of the difference in the mounts

Thanks GC and Chuck.

So the 2nd and 3rd design are interchangeable?

Thanks again, John

Dec 15, 2009 | 09:26 PM

RollaMo-LT4

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From: Rolla Missouri

2021 C4 of the Year - Unmodified Finalist

St. Jude Donor '10 thru '25

Some very good reading here:
http://forums.corvetteforum.com/c4-t...-c4-roofs.html

Dec 15, 2009 | 09:26 PM

Goldcylon

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From: Peoria Arizona.. Resident Gold Cylon

Quote:

Originally Posted by jrd1990zr1

Thanks GC and Chuck.

So the 2nd and 3rd design are interchangeable?

Thanks again, John

No the hardware is different as you can see the shape and the offset is slightly off. I am unaware if you can simply remove the hardware from one to the other although the panel itself is identical. I do know however that and 89 top will fit all MYs C4 from 89-96 and vice versa.

See the above post even better pics of those brackets so you can clearly see the differences. GC

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Dec 15, 2009 | 10:58 PM

timbradley26

Instructor

Joined: Jul 2009

Posts: 228

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From: carmel , palm springs ca

thankyou for the link i have been trying to figure out how to adjust it now i now what to do . happy holidays

Dec 16, 2009 | 10:04 PM

#10

Livin the Dream

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From: Robesonia Pa

Quote:

Originally Posted by Goldcylon

I also know that the 89 and up top will fit the 86l-88. You have to buy the front mounts for the car as well as a the trim piece. then you can swap the mounts to match the targa. There used to be a kit now you have to go to a vette recycler for these parts or fleabay

Jan 2, 2026 | 04:18 AM

#11

Tof

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From: France (Britanny)

Hi !

If I understand correctly, for my 84-86E, if I want to put on a post-1989 t-top, I will have to:
- change the front mounting brackets above the windshield.
- modify the front upper windshield trim panel, that is to say, drill 2 new holes for the new spacing of the roof fixing screws, correct ?

But if I always own the original roof, can I just remove the mouting brackets that were on my old roof and install them on the new one ? If it’s possible ? I presume no... but i wonder

Thanks !