Re: 366 Big Block
Heck, I bet the 366 block will probably swallow a 4.25" crank just fine!
Might have to do some grinding, but I kinda doubt it. (Fwiw, it has a 3.935" bore vs a 454 at 4.25"!)..
My '75 454 P/U block did!
Only problem is that even with a .125" overbore and the 4.25" crank, you only make an undersquare 434" motor. (Undersquare means that the stroke is longer then the bore is wide is all. Great for low rpm torque!)..
Using a 454 with a .100" overbore, you make a 505.5" oversquare motor so why walk away from the cubes? (Oversquare means that the bore is wider then the stroke is long, better high rpm capability!!)...