I'm gonna start by saying I SCREWED UP!!!! I thought that by buying a tpi system bit by bit it would be cheaper!! Now I have a 85 tpi upper and lower plenum, a set of runners, throttle body,fuel rail and a complete set of 305 injectors and sensors. The distributor is a HEI coil in cap with out the vac advance with a flat connector. And a pretty nice harness with a few wires cut and a few missing plugs (like the manifold air temp I cant find ANYTHING to plug in there) I also have the ECM and a bunch of relays the MAF and the boot between the TB and the MAF. I also have a stripped 88 TBI car that I'm planning on using as an autocross lapping days car. I NEED a harness that is a stand alone system as there is NO wiring in this chassis. can anybody point me in the right direction? I don't have a ton of money left over after buying the saftey stuff I needed for the car PLEASE HELP. Keith

 

Go to the TECH board on this site. There are several items telling how to convert TBI to TPI there.

 

Buy some wire and make your own from a manual.

 

The would work.

http://chevythunder.com/speed_density_harness.htm

Or a Holley 950 Commander ECU and harness, $840.00 from Summit.

You would still have to have a harness for the starter/charging circuit.