1989 mustang 2.3 ignition wiring to a 302
looking for help trying to wire a 302 into a 2.3 car. Can't seem to wire to factory ignition. Can only get car running with ignition bypassed. Anyone else run into this problem? most of the factory harness from under hood is gone, except for headlight wires and some of the starter solenoid. there are 2, 8 prong plugs as well. The computer and wiring is gone, along with old engine harness. appreciate any response.