Replace 5.7 tbi motor with 5.7 carbureted motor

[floutlaws]

I have a 1993 ½ ton 4x4 auto, with the tbi 5.7. I am looking at the possibility of changing to an old school ruff idle, carbureted motor. My truck is not a daily driver so time is on my side.

Beside the motor what else would be needed, I’m thinking flex plate, torque converter about 2000-2500 stall maybe from a Corvette. The computer stuff that plugs into the motor they will be not cut but hidden under something. Any thoughts on this would be great.

I don’t know too much about building a tbi motor. I’m only looking for 325 – 350 hp. I would also like to put a 75 – 100 shot of nitrous just to have for fun. The heads on the tbi can they be redone to actually let them flow. I have only seen one intake and not to much aftermarket TBI units. Holley and a couple machine shops that build there own and sell.

Thanks for any insight, experience, knowledge, for this new guy…

 

[1990GMCSIERRA]

id stick to fuel injected and get the holley or edelbrock tunable fuel injected system

 

[FastOrange]

I did that exact swap, went from 4.3L TBI to 350 Carb, with big cam and a Holley 670CFM Carb, here is my How-To thread on how to get the 4L60E to work and how to plumb the fuel system.

http://www.gmt400.com/forum/showthread.php?1362-How-To-Ditch-EFI-and-keep-TBI-PCM-for-4L60E-Control.

 

[FastOrange]

I have a 1993 ½ ton 4x4 auto, with the tbi 5.7. I am looking at the possibility of changing to an old school ruff idle, carbureted motor. My truck is not a daily driver so time is on my side.

Beside the motor what else would be needed, I’m thinking flex plate, torque converter about 2000-2500 stall maybe from a Corvette. The computer stuff that plugs into the motor they will be not cut but hidden under something. Any thoughts on this would be great.

I don’t know too much about building a tbi motor. I’m only looking for 325 – 350 hp. I would also like to put a 75 – 100 shot of nitrous just to have for fun. The heads on the tbi can they be redone to actually let them flow. I have only seen one intake and not to much aftermarket TBI units. Holley and a couple machine shops that build there own and sell.

Thanks for any insight, experience, knowledge, for this new guy…

i would scrap the TBI heads, get a set of Vortec heads.

 

[FastOrange]

Also if your going ot do it, pick up a holley with an eltric choke and buy the $150 holley TPS kit, it is a VERY nice kit and way more better then rigging up something for the TPS, plus you can keep the Choke.