my good flatty block is a 221. i was planning on a 4 inch crank for it. a few people ive talked to said it will not fit because the rods will hit the lower part of the cylinder. i guess this is not a problem with the 239s. i dont know if the blocks are cast different. i know the bore is different. anyone here have any experience with this?? if all else fails, ill just use my 3.75 crank. im not building a race car or anything. just want that cool flathead look and sound!

bob