So I am putting an 2003 Mach 1 Motor in my 2002 GT. The GT has the 5 speed manual. The trans is the TR-3650.
. The mach 1 motor comes with headers. Its a complete engine. I am keeping the stock wiring harness from the GT. Any info would be great on how to make this a smooth swap.
Will I need a tune before starting the car?
What all will I need.

FIRST BUILD