LEAKING HEAD With CPPA HEADERS !! I WANNA CUT THEM OUTTTT

Definitely change all the expansion plugs if you are pulling the engine.
I have a 440 with the CPPA headers. Have done it enough times that in one hour I can have the engine out, from the top a little longer going back in. You need to have the correct attitude and not get pissed off while working on this stuff.

onig