FE detectives:
FYI:
Crossbolt blocks are easily duplicated. I know a gentelmen that has a 390 via Southern Automotive with cross bolt mains. It is an easy external check but never base a purchase off that detail. It might be prudent, if you are not a FE gear head to purchase FE's at 390 prices unless via a Gessford, FE Specialists, Shelby, etc a source that lives and dies by their products. It will not be easy on the pocketbook however it is peice of mind.
It only stands to reason when the cost of a true 427 SO can exceed five figures some 390, 428 FE's become high dollar SO's by builders that are in it for the short term $$$.