91 Convertible Spoiler
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Joined: Jan 2005
Posts: 353
Likes: 19
From: Ft Myers, FL
Car: 92 Firebird Conv
Engine: 305
Transmission: T-56 w/3.42 Posi
Originally Posted by gray89vert
actually the center piece is the same, the sides are different thats all
Joined: Dec 1999
Posts: 5,964
Likes: 37
From: Hacienda Heights, CA
Car: 90 RS 'Vert, 88 IROC-Z, 88 Firebird
Engine: 305 ci tbi, 305 ci tpi, 350 ci tpi
Transmission: WC-T5, WC-T5, 700R4
Axle/Gears: 3.45, 3.27, 3.27
All 3 pieces are unique to the convertible. The only part that interchanges with the coupe is the HMSL (high mount stop light) lens. It is the same as the coupes from 86-90.
Lon
Lon
Joined: Sep 2005
Posts: 6,258
Likes: 6
From: O'Fallon, MO
Car: 1991 Z28 convertible built 3/1/1990
Engine: Cammed 6.0L LSX
Transmission: T56
Axle/Gears: custom Ford 8.8", 4.10 gears
i'm pretty sure these guys are right. the center part of the spoiler on my IROC is more rounded on the edges...but it could just be a different style spoiler from 86-90/91-92. however i still believe the convertible center piece is specific to the convertible model only
Joined: Jul 1999
Posts: 2,926
Likes: 5
From: Tucson, Arizona USA
Car: 1987 Z28 Convertible
Engine: 305 TPI
Transmission: 5-speed
Lon is correct. All three pieces are different. He's the convertible expert here. And if that doesn't suffice, I'll step in and say the same thing. Today, I own one convertible and one coupe. If anyone doubts us, say so and I'll take a couple of very definitive pics of both, showing the difference.
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Joined: Dec 1999
Posts: 5,964
Likes: 37
From: Hacienda Heights, CA
Car: 90 RS 'Vert, 88 IROC-Z, 88 Firebird
Engine: 305 ci tbi, 305 ci tpi, 350 ci tpi
Transmission: WC-T5, WC-T5, 700R4
Axle/Gears: 3.45, 3.27, 3.27
Originally Posted by TPl383
Deff. different. I sold the center section off my vert to a buddy for like $100shipped.
put a 91-92Z on mine.
put a 91-92Z on mine.
Lon
Supreme Member
iTrader: (33)
Joined: Jul 2000
Posts: 5,945
Likes: 1
From: Boosted Land
Car: 92 Z28
Engine: Boosted LSX
ya he did. His blew off on the hiway and mine was just collecting dust so I figured what the heck.
I still have other parts i should dig out Im not usin like the rear pannels by the seats.
I still have other parts i should dig out Im not usin like the rear pannels by the seats.
Junior Member
Joined: Mar 2006
Posts: 5
Likes: 0
From: Boise, Id
Car: 1991 firebird vert
Engine: 350 crate
Transmission: Automatic
Axle/Gears: Stock
unfortunatly it isnt exactly the same. the hard top spoilers were one peice since they didnt have a trunk ours was split into 3 peices for the trunk. There is a site out there( i lost the bookmarks) that is making new spoilers for the 3rd gen verts again, just do some searching for it i promise it is out there somewhere.
Senior Member
Joined: Sep 2002
Posts: 762
Likes: 1
From: Long Beach, CA
Engine: 305 TPI (LB9)
Transmission: WC T-5
Originally Posted by lonsal
All 3 pieces are unique to the convertible. The only part that interchanges with the coupe is the HMSL (high mount stop light) lens. It is the same as the coupes from 86-90.
Lon
Lon
'86 had the hatch glass mounted CHMSL; '87-'90 had the spoiler mounted CHMSL.
The only difference that I've noticed in the '87-'90 years is the 'sport coupes' had a slightly different CHMSL light, unique to the sport coupe spoiler (which is slightly raised off of the hatch lid). It is almost impossible to tell the difference on the car, but once you remove the lights and put them side by side, there is a slight difference.
Joined: Dec 1999
Posts: 5,964
Likes: 37
From: Hacienda Heights, CA
Car: 90 RS 'Vert, 88 IROC-Z, 88 Firebird
Engine: 305 ci tbi, 305 ci tpi, 350 ci tpi
Transmission: WC-T5, WC-T5, 700R4
Axle/Gears: 3.45, 3.27, 3.27
I couldn't recall off the top of my head if it was 85 or 86 that had the one-year HMSL attached to the exterior of the upper hatch. To satisfy my curiosity I'll have to look up part numbers to confirm a difference in HMSL on the SC model, I'm not aware of it.
Lon
Lon
Joined: Jul 1999
Posts: 1,421
Likes: 24
From: Stavanger area, Norway
Car: 86 IROC Convt
Engine: 305TPI
Transmission: TH700R4
I remember reading a long time ago, shortly after I got my vert, that the smaller third brake light found on the 86/87 convertibles were actually a Ford light *shrug*... Does anyone know if there is any truth to that?? And if so - which Ford?

Ken

Ken
Senior Member
Joined: Sep 2002
Posts: 762
Likes: 1
From: Long Beach, CA
Engine: 305 TPI (LB9)
Transmission: WC T-5
Originally Posted by lonsal
I couldn't recall off the top of my head if it was 85 or 86 that had the one-year HMSL attached to the exterior of the upper hatch. To satisfy my curiosity I'll have to look up part numbers to confirm a difference in HMSL on the SC model, I'm not aware of it.
Lon
Lon
Others have called me on this as well and while I'm not sure if there is a part number difference, I've found a couple of sport coupes in the boneyard over the years that do, in fact, have a slightly different 3rd brake light, specific to the sport coupe spoiler. I'll try and dig around the garage this weekend and see if I can turn one of them up and post pictures.
1986 was the first year that 3rd brake lights were required on passenger cars in the US, and it was obvious (as was possibly the case with the F-body) that many manufacturer's tooling was not quite ready to incorporate the change into the car bodies, as many cars during the first couple of years of the requirement had lights that looked like an afterthought rather than an integral part of the design.
Originally Posted by ChevyKen
I remember reading a long time ago, shortly after I got my vert, that the smaller third brake light found on the 86/87 convertibles were actually a Ford light *shrug*... Does anyone know if there is any truth to that?? And if so - which Ford?
I have also heard this, but I, too, am not sure which model Ford is was. Being that the early CHMSL's were made in Italy (stamped in the plastic), it's quite possible that the same light model was used on a few different cars.
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