being new to the slant 6 can anyone tell me about the differances between them?

The 60's to 1980 were all solid lifter cam engines.1981 Chrysler went to hydraulic cam shafts.They changed the head around 74 from spark plug tubes in the head to the small "peanut" plugs with the 5/8 hex.Also around that time they changed the block for the use of cast iron crankshafts,before they were forged steel crankshafts.The cranks will not interchange. 1967 was the last year that the crank pilot was a smaller diameter,it changed to a larger pilot in 1968-up.

The resident Slant expert on this site is SLANT SIX DAN.He has a outstanding amount of knowledge went it comes to the the "Leaning Tower of Power".