ok i have a 85 firebird with a 2.8mpi i am putting in a carbed 350 what wires from the 2.8 do i need to keep i want it to look real clean when finished

 

can anyone help with this by the way it is a 85 firbird no smog or ac just the basics please help i want to get started real soon

 

You need (most) all the wires from the bulkhead (for lights, coil gauges, etc). All the wiring from the pass side fender by the heater box is ECMand worthless to a carb'd engine, throw it away.

You can also try doing a search looking for "TPI or TBI to carb swap". You should come up with quite a bit of useful info by doing that.

 

Another way to do it is to go ahead and do the swap, then worry about cleaning out unused wires. You'll want to leave anything running to the starter. Also, you'll want to keep a switched 12 volt power supply for the distributor and an electric choke (if you will be using one). When I did mine, I installed the engine and used what wires I needed to get it running. Once I knew everything was ok, I worked on eliminating and cleaning up what wasn't needed

Deadbird's suggestion sounds right on to me. All that stuff that goes behind the passenger side fender to get around the firewall and then enters the passenger compartment behind the kick panel is ECM. I ended up cleaning those up one by one, since I had used one as a power source. Guess that's one problem with my method, huh?

 

hay thanks guys so nothing that runs to the ecm is needed i thought that i read somthing about needing the fuel pump wiring or something i want to get it all out before i do the swap becouse i am painting the engine bay and don't want to have to mess with any thing not needed thanks guys

 

Hmmm, I didn't think about the fuel pump. I used a mechanical pump. If I'm reading my wiring diagram right, the fuel pump relay does interface with the ECM. Maybe somebody can verify?