89 305 to 90 350
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89 305 to 90 350
hey so im new to the 3rd gen world but i recently purchased a 1989 camaro iroc z wth a 305 and i have a 350 from a 1990 i want to swap in. I know the injectors knock sensor prom and all that need to be changed over but my question is do i need to buy parts for the 1989 or parts for the 1990 because i know some part numbers are different
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Joined: Jun 2009
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From: Evansville, IN
Car: 1983 Z28
Engine: Forged 355
Transmission: 700r4
Axle/Gears: 2.73
Re: 89 305 to 90 350
They are so close in year more than likely nothing is different, but all motor parts that you buy from auto part stores buy them for the '90 350
Last edited by TheMonster; May 10, 2012 at 12:45 PM.
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From: Wichita Falls, TX
Car: 91 Firebird,00 c2500,75 Vette
Engine: 3.1 but 350 soon, 350, 350
Transmission: T56 soon
Axle/Gears: stock 3.42 Posi to come
Re: 89 305 to 90 350
Any parts for the fuel injection (I am assuming TPI because it is a IROC) I would order for an 89 because of minor differences between the 89 MAF TPI and the 90 speed density TPI(all sensors and emissions included etc). I would tell them 89 350 for those parts. Anything that isn't fuel injection related but engine I would tell them 90 and what the motor came out of.
Joined: Mar 2000
Posts: 43,187
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Senior Member
Joined: Jun 2009
Posts: 511
Likes: 0
From: Evansville, IN
Car: 1983 Z28
Engine: Forged 355
Transmission: 700r4
Axle/Gears: 2.73
Re: 89 305 to 90 350
I thought we were talking about the motor? 
I'm not sure which people like better, but why not go with your same computer and setup?
I'm not sure which people like better, but why not go with your same computer and setup? Last edited by TheMonster; May 12, 2012 at 11:17 AM.
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From: Pgh PA
Car: 89 5.7 IROC/95 LT1 Corvette
Engine: All 5.7's
Transmission: 700R4 (Roessler)/ZF6
Axle/Gears: 10 bolt Zexel 3.23's. CTW 17" wheel
Re: 89 305 to 90 350
It would be easier to keep the MAF so you don't have change the cars wiring and computer. Just use the 305 intake set up, get a "chip" for an 89 350 and use the 350 injectors. If I was doing it I would use a new set of injectors....
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