So I took my old 355, replaced everything except the block. and it has been completely remachined and clearanced, studded 4 bolt main for the 3.75 stroke crank. Fully balanced from the balancer to the flywheel. crank to piston and rods too. Full floating pistons instead of the old style press pin.
I am sure it should pull my harley trailer well, sound great, and tame a few ponies too.. ; )
O BTW! They just went to F.I. in the Pro-stock drag recently.