yes the 366 and 427 block is taller than 396-454 but only the block
the head are basicly the same as car head expt smaller port with higher volicity wich makes lots more low end tourq
and the orgnl pistons in the 366 are a 4 ring piston with with diffrent wrist pin location
I plan to use stock style 9.5:1 454 pistons
and new 427 car moter connecting rods
would there be any advantage powerwise to use the 366 truck block and itake?