89 silverado 5.3 swap

[lilredls1]

so im starting my swap and getting everything ready for the new motor. the motor and tranny are coming out of an 03 tahoe and i have a question. what wires do i keep that run out of the driver side firewall on the 89? and will camaro longtube headers work on this motor and clearence my frame?

[keniff]

id think all youd need is your ALT wiring, ignition to your starter, your oil pressure wires, and temp wires
the fuel pump should be ran off your new harness. i may be wrong i dunno. im just ordering a new harness if i fail at my reworking