Mopar R1 block

Interesting! It’s a crap shoot with the R1, there were some on the fly changes with those during the early development of the race program. But post pics if you get to see it! But it should have capability for four bolt mains via filled in main webs and the pan rails should be cast solid as well. There’s a little information on AllPar on the small block section that is a decent introduction. The mid nineties Mopar Engines manual covers the design changes from R-1 to R-3 in very good detail if you can gain access to one.