Greetings to all. I'm swapping a TPI to a carbed engine in my 88 IROC (originally an L98) and was wandering if anyone had experience with this. My concern is the fuel injection at the computer. I'll be adding an MSD ignition box (6AL) and am concerned that the computer will not work properly. I'm putting a massaged 350 back in and I'm not worried about emissions - no smog, O2, cats etc... I'm sure there is a wiring change needed, any suggestions? I can get a harness from Painless for an NA engine but don't want to hassle with changing the whole harness out. Any info would be greatly appreciated. TIA! David

You don't have to "change out" the wiring. Just remove the harness that goes to the pass side fender; follow them all to where they go, and carefully, USE NO DYKES, just peel all the wires back in the engine compartment, and unplug the harness from the ECM, and remove it from the windshield cowl beside the kick panel, remove the ECM, and put it all in a box and keep it or sell it intact.

You'll need a non-computerized distributor; and some way of activating your torque converter lockup (you can buy kits for that). You'll need to either do away with the in-tank fuel pump and run a mechanical or other electric one; or rig up some way to power the in-tank pump, and run a 3-port regulator. That's all you really have to do to the wiring.

Thanks. Great info!
I appreciate it.
David