Are you trying to install a head with the intake and exhaust manifolds already installed on it? It never occurred to me to do it that way so it's hard to comment on how that would work. Personally I like to assemble one piece at a time (put a bare head on the block, then install manifolds, etc). The head would be rather heavy and hard to align with manifolds on it. Perhaps if you had a helper or maybe you could hang the head from a rafter using a pulley or something, then drop into place after everything is aligned??? Good luck. Tim