1976-’88
Chrysler installed the bigger starter on the 360 in ’76, so the bolt boss for the transmission brace on the left side was moved forward one inch to provide more clearance for the starter. These engines all had flat tappet cams. The castings were 4179930, 4006830 and 4045610.
Also if someone converted to a roller cam the pushrod holes in the head would have to be the larger holes from the factory 5/8" hole 308 casting heads or machined clearanced for earlier heads. As stated earlier looking through the distributor opening at the lobe and lifter is easy to see what you really have.