Wiring..

[LS1GMCTruck]

You can do it either way. It's a hell of alot eiser to pull out the iring you don't need and wrap it back up with the harness out though. The worst of it all is dropping the lower control arms to get to the motor mount bolting. I didn't have access to all of mine but it sure made installing the engine easier because I was able to align everything loose and then tighten things up centered.

I didn't even do that. I fabricated simple adapters to bolt from the exsisting V-6 frame mounts, to the standard LS1 block mounts. Worked perfect. Nice & low...and engines right up against the firewall like I wanted. With the Vette accessories I used, I have gobs of room between the front of the engine & the radiator & the best center of gravity(CG) possible.