If anyone has done it I'd appreciate some advice. When I swap the head, would it be easier to do the wiring with the harness in the car or take it out and then re-install the harness.

 

I make these harnesses all the time. For me it's easier with the harness out of the car. Since your gonna swap the head, I would get all the wiring done before you put the head back on. This will make it easier since the manifold will be removed and have more room for you.

 

Ok I figured but I was'nt sure. It's not like its hard to get out. thanks