Apologies to the O.P. ! Oil pan windage in a 426 hemi is no diff. than a r/b wedge, the cranks will interchange, same internal block deminsions, take same windage trays ''if stock stroke'' /etc. The biggest diff. is 4 bolt to bolt mains. Due to a fair amount of oil running down the corner drain back holes on the hemi, I`d think it would have less windage than the wedge, that`s why they put them there !
