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305 to 350 swap questions please help

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Old 03-03-2012, 04:23 AM
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Car: 91 z28
Engine: 305 tpi
Transmission: WC t5
Axle/Gears: 3.23 posi
305 to 350 swap questions please help

Ok I've spent the last 4 hours searching threads on here and kinda hit and miss on a couple things was wondering if y'all could possabily help clear them up.

1. I have a 91 z28 with 305 tpi with the t5 trans, I just bought a 350 tbi out of a 92 1500 pickup and I'm going to swap my tpi set up over and replace the tbi.

2. I know I need differant injectors, knock sensor, and a prom whatever that is and that's my first question what is the prom??

3. The other question is what else do I need from the donor truck? Like computer and wiring etc...

4. What can I use off my tpi set up on the 350

Thanks for any help y'all can give and if ya give me a hard time for this topic being over posted then I'll take the criticism cause I probably deserve it but I want to do this swap bad
Old 03-03-2012, 06:35 AM
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Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
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Axle/Gears: QP 9" 3.73
Re: 305 to 350 swap questions please help

Originally Posted by tmknow3
what is the prom??
the chip ( blue thing ) inside the computer.Take your 305 one out and install a 350 prom



Originally Posted by tmknow3
. The other question is what else do I need from the donor truck? Like computer and wiring etc...
Nothing ( unless you want to install TBI in your car )

Originally Posted by tmknow3
. What can I use off my tpi set up on the 350
Everything
All you are doing is swapping a different engine under the intake so nothing changes up top
350 TPI identical to 305 TPI except for the 350 specific items you already know about
Old 03-03-2012, 10:58 PM
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Join Date: Jan 2010
Location: King NC
Posts: 17
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Car: 91 z28
Engine: 305 tpi
Transmission: WC t5
Axle/Gears: 3.23 posi
Re: 305 to 350 swap questions please help

Ok so the hard one to find will be the computer chip. Can I have tpichips.com just make me one?? Cause I've got an extra 305 chip in my shop
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