Hey, just wondering if a Holley 670CFM TBI will work on a GMC 1995 350 TBI. I know they only list those as working for 88-92's? How muck work would be involved in making it work.
Thanks




1995 GMC Z71 5.7 TBI
Thorley Headers
Highflow Cat
Catback Exaust
180* Stat
Flex-A-Lite Flex Fan
MSD Coil
MSD Wires
Homemade Ram Air (Removed Silencer)
Injector Spacer
K&N Filter
Hypertech Powercharger

I just installed a holley throttle body (#502-6) on my 1993 350, and I am having two minor problems. First, the reason the holley only fits trucks from 88-92 is because of the TPS hookup. I am hoping to acquire a TPS plug from an older pickup at a junkyard or something. That would fix that problem. The truck does run right now, but lack of a TPS sacrifices quite a bit of driveability and power. Also, I don't know how to adjust the fuel pressure on the tbi. They said it is adjustable, but I don't know how. So, in a nutshell, it will work, but unless you splice in a different connector for the TPS, it will run like crap. It seems like I saw that someone (maybe holley?) made an adapter for the different TPS, but I'm not sure.

i would throw a 600 cfm 4 barrel carb on there lol. my 73 c-10 has that on a 350 that was pulled out of a wrecked 1990 monte carlo. i know they probably didnt come with 350's and i think the monte must have had it put in aftermarket cause its a mexican GM crate motor. i think its better because of the lack of a controlling computer that can limit stuff i dunno tho...

If you have the time and patience to learn the TBI injection system, you will never return to carburetion. Technology CAN be great, if it is used advantageously.