[mongocanfly]

Ditto to what solid says..the ls stands alone just be sure to ground everything ( motor to frame, body to frame, motor to body, of course battery to motor..) you can't have to many grounds, but on your truck side harness you will still need power as well so dont forget to hook that back up to. I used the big red wire from the hei for my switch on power, the original starter wire from the key went right back on the ls starter and the hot side wire from the starter went back up to the 2 pole connector on firewall above distributor and that should keep all your truck electrical working and that's where I picked up my constant power.