Helping a friend get a camaro running. Need to know if anyone has run into this before. Turns over fine with a new battery and wants to start, but only firing on 3 cylinders. TDC is verified, fuel is no issue. New plugs, wires, cap, rotor. Car is a few miles away, and I didn't write it down, but from what I remember, it is firing on cyls 1 and 3 driver side, cyl 2 on pass side. Motor is built inside and out with race ready (street) internals (not that it changes basic engine 101). Only ignition part not replaced yet is the coil. Was told it ran fine the last time it did (5yrs ago). Did all the pre start processes with fresh oil, pump and valvetrain priming, upper cylinder lubrication, manual crank turning, etc....
Under the dash is a wiring nightmare from previous owner. Any help would be much appreciated.... :/