What to do...
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Joined: Mar 2010
Posts: 399
Likes: 1
From: Toronto, Ontario
Car: 88 (SOLD) & 90 Iroc convertibles
Engine: 5.0 TPI, 5.0 TPI
Transmission: 5 speed & auto
Axle/Gears: 3.08 & 2.73
Re: What to do...
I was going to originally say dont do it but if you kept the LB9 for future install back into the 90 vert then why not.
Re: What to do...
If the car is virtually flawless, I'd leave it stock. There are so many thirdgens out there that have nothing to lose, there's no reason to tear into an original car for a project.
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Joined: Sep 2008
Posts: 268
Likes: 6
From: Tifton GA
Car: '92 Formula, '92 TA, '91 ZR-1
Engine: 350, 305, LT-5
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Joined: May 2009
Posts: 156
Likes: 0
From: So-Cal Upland
Car: Had 2 iroc-z's . An '87 & '88.
Engine: HAD 5.0 & 5.7 tpi
Transmission: 700r4
Axle/Gears: stock
Re: What to do...
What part was the myth? You couldn't get the 350 based cars with TTops starting in 1990 because of the added weight of airbags, etc. Once the car hit a certain weight, gas guzzler taxes and other gov't garbage came into effect. A salesman would have told you that it was because of body twist, etc. They heard a rumor and everyone ran with it. Added weight increases emissions, decreases fuel mileage and who knows what else. The Formula was available with both after 1990 only because it didn't have the added weight of the ground effects. Kind of makes sense.
Re: What to do...
Damn, my memory isn't what it used to be; used to be a walking encyclopedia on third gens, but life got in the way for the most part. That blows, I'd love a '90 350 with ttops.
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From: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
Car: 87 Formula T-Top, 87 Formula HT
Engine: 5.1L TPI, 5.0L TPI
Transmission: 700R4, M5
Axle/Gears: Sag 3.73, B&W 3.45
Re: What to do...
The cars that were available in the UNITE STATES with CC1 & L98
1987 & 1989 IROC
1988 Limited, not sure if I have seen verified Camaro L98/CC1
1989 T/A, GTA & Formula,
1991 - 1992 Formula
It should be noted that there were several 1987 GTA's with the L98/CC1 shipped to Canada. I cannot get the exact number at this point... Interestingly as far as I ahve ever seen, there were NO Formula 350's in 1987 or 1988 with the CC1 & T-tops, not even to Canada.
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ThirdGen Firebird Rep
ThirdGen Firebird Rep
Joined: Jun 2000
Posts: 3,435
Likes: 4
From: Sarasota FL
Car: 99 WS6 / 00 SS / 11 CTS-V / 13 300
Engine: LS1 / LS1 / LSA / 5.7 Hemi
Transmission: 4L60E / T-56 / 6L80E / W5A80
Axle/Gears: 3.23 / 3.42 Auburn / 3.23 / 2.62
Re: What to do...
Good luck... they do not exist, NON, ZERO, NADA. 1990 was the only year that definitively that did not produce a single one like that, Firebird or Camaro.
The cars that were available in the UNITE STATES with CC1 & L98
1987 & 1989 IROC
1988 Limited, not sure if I have seen verified Camaro L98/CC1
The cars that were available in the UNITE STATES with CC1 & L98
1987 & 1989 IROC
1988 Limited, not sure if I have seen verified Camaro L98/CC1
I have one sitting in my garage! If you check my other thread with all my car pics, I don't have a pic of the RPO sheet up but I do have many pics that show a clean t-top IROC with a 5.7 TPI logo on the back bumper...And yes, it definitely has a 350
Not just verified by the RPO sheet, but also by 
Just got home with the TA earlier...hadn't driven it since I drove the IROC to a cruise night Wed night. Those 45 ci extra really do make a difference!
Re: What to do...
This one also seems to verify 88s, granted I haven't seen the RPO or crawled under the car but given the low miles and condition, it seems legit.
http://www.autotrader.com/fyc/vdp.js...standard=false
http://www.autotrader.com/fyc/vdp.js...standard=false
Thread Starter
Member

Joined: Dec 2008
Posts: 401
Likes: 0
From: Tyler, Tx
Car: 1991 Z28 Vert
Engine: 305 TPI
Re: What to do...
Hate to jack my own thread...LOL but just thought I'd throw in that I'm still looking for a 90-92 IROC/Z28 vert. I don't have the time for a ground up resto but I'm not looking for a car I can't drive because I don't want to decrease its value.
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Joined: Mar 2001
Posts: 14,298
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From: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
Car: 87 Formula T-Top, 87 Formula HT
Engine: 5.1L TPI, 5.0L TPI
Transmission: 700R4, M5
Axle/Gears: Sag 3.73, B&W 3.45
Re: What to do...
your slacking... I think you need to find the backup of your crashed laptop...
umm... well.. how do I say this... Buuuut...
Find a 1990 L98 Camaro or Firebird with CC1, and I will show you a car that someone has converted, or I will eat my shirt... Its not a Factory job...
ZERO 1990 IROC's were made with the CC1 AND L98
John
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Joined: Mar 2001
Posts: 14,298
Likes: 197
From: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
Car: 87 Formula T-Top, 87 Formula HT
Engine: 5.1L TPI, 5.0L TPI
Transmission: 700R4, M5
Axle/Gears: Sag 3.73, B&W 3.45
Re: What to do...
I had a chuckle... 
John

John
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