I have a stock 85 Camaro with the 305 TBI and Automatic Tranny. I also have a TPI system complete with ECM from 86 Camaro Iroc 305. What I want to do is put the TPI on a 350 and put it in the 85. So far I have another gas tank lined up with electric pump in the tank, and am planning on a wiring harness (86 Iroc) from Painless. I am looking at getting a EPROM from the local Chevy dealer for an 88 Camaro 350. Does anyone see any possible problems or suggestions?

No 305 TBIs in 85. You've probably got the LG4 Carbureted 305.

I'm doing the same swap, and I also have a lot of questions. Did you already got some respons to it or did you find some more info about the swap?
I have a ZZ4 and want to use a tpi but I don't know what I have to change to the tpi to make it run ok...
Any help would be grate!!

Me too. I'm thinkinag about doing the swap from 305TBI to 350TPI and need info. Thanx

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'88 CAMARO 305
OPEN AIR ELEMENT
FLOWMASTER CAT BACK EXHAUST

COMPUTER CHIP
HYPERTECH 160* THERMO.

I, too, am swapping from 305 TBI to 350 TPI. I have an '86 L98 from a Corvette and will be converting it from MAF to SD.

If you can't find a speed density harness at the junkyard for some reason, or want to buy one new, here's the cheapest I've found from GMPARTSDIRECT:

12080890 Speed Density Wiring Harness 447.60

I've heard far, far too many horror stories about using Painless, etc., versions.

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1992 Pontiac Firebird Formula (original 305 TBI) The project has begun:
just purchased 350 TPI, Dual fan setup, OEM Posi, GM 3.42 gears and JEGS Ultimate Support Cover for 7.5 rear.

1997 Chevrolet Camaro SS # 379 (1 of 371 Black, T-Top, 6-speed)
1973 Chevrolet Camaro RS/Z28
1969 Chevrolet Camaro SS 350

RIP Dale Earnhardt.

I'm old enough to know better, but still too young to care!--Wade Hayes