351m short block
Of course the crank and slugs are different but as far as the "rebuild" is concerned there is "no" difference. Every thing bolts up the same. Nothing extra to buy or screw around with.
1977 Ford F-100
400m/c6/4:11/Gear Vender O.D.
Crane hydralic roller, forged, ported polished,Deamon,Edlebrock, yada, yada, yada
280,000 miles
Stock on the outside
modified/rebuilt everything