Third Generation F-Body Message Boards - Engine Swap

305 carbureted into a V6 car� wiring?

AGELE55 — Thu, 30 Apr 2026 23:50:56 GMT

This is a 92 project car that was originally a V6. It came to us with a 305 sitting in the hole but not set up to run.
We got the 305 running with a remote starter setup. Now it�s time to sort out the wire harness. We are not sure if this is the V6 harness, or if the PO included a 305 harness. We have a number of mystery connectors, ring terminals, and fusible links to figure out.
Question 1- With the harness roughly laid in, it appears there are fusible links with large ring terminals grouped together ending up near the starter. I assume these go to the BAT terminal. Along with the fusible links is a large purple wire that the PO cut off. This appears to be our start voltage to the solenoid�correct?
Question 2- Further down the harness there is a branch with an additional three smaller ring terminals, two of which have fusible links. Any clue where there are supposed to go?

1986 iroc TPI to carb

Dave Keefer — Sun, 26 Apr 2026 18:17:51 GMT

Hi Guy�s I would appreciate some advice, I put a 350 in my 1986 iroc and have attempted to go from a TPI setup to carburetor, the plan was to use the existing fuel injection tank pump and then use a regulator to adjust the pressure for the carburetor, . I�m nervous about running a regulator as if it fails I�ll have a flooded carburetor and possibly a fire . Is there a way to use a mechanical pump with the current tank lines ? Thank you

Ls swap wiring help

CJY — Sun, 26 Apr 2026 07:26:28 GMT

Doing a 5.3/4l60e swap on a 92 firebird, I purchased the racetronix kit for a thirdgen. The kit came with a racetronix 255 fuel pump and a separate relay that's mounted in the back and plugs into the factory bulkhead behind the rear seat going to a black, purple and gray wire. The 5.3/4l60e is on a stand alone harness and has relays for the ignition and fans. Do I need to wire the factory fuel pump relay back in or how do I go about getting the rear fuel pump relay for the fuel pump to activate with the key on?

Fuel Pump Relay Wire Location Under Dash

upstateRich — Wed, 22 Apr 2026 14:22:40 GMT

Could someone please let me know where the fuel pump wire is located under the dash on a 1989 Firebird? I know where it is located on the C100 but I am looking to tap into it for my LS PSI harness
Thanks Rich

LS Swap fusible links

upstateRich — Sat, 18 Apr 2026 13:47:24 GMT

I have a LS1 in my 1989 Firebird with a PS1 stand alone harness and a vintage air A/C system.

I cleaned up my C100 with very little left, my question after removing all the unneeded wires including the old A/C and blower would the fusible links need to be changed to a different size? If they stay the same could someone please let me know what size that I would ask for when i purchase new ones.

Thanks Rich