I no of an iron headed 440 with a 6/71 that made 875@5750 and 890@4500 with a stock steel crank. it went two sesons running low 9's in a valiant, untill he put in thicker head gaskets and swapped to carbs and pump juice.
and aren't they the same forging as a hemi crank? that were used in topfuel in the 60's?
