i like your sign. i stopped by a local machine shop that built my 44o six pack eng and he had found a block in the back of the shop that is an hp some expert called him and told to look for extra web reinforcements that all six pack engines have (not!)
and that because it has a f in front of the 440 it is a six pack motor (not) i was pretty sure unless you had the car there was know way to tell. i heard that all six pack engines have a c stamped on the pad for special pistons but who knows?