I run a R3 solid roller on the street babbit 2" cam had to made by Tighe cams in Australia $600 about $480 US Victor Heads Crane ultra pro lifters 48 degree 9.6 deck .
Needed some work on the Pushrod holes for clearance
check on the top front of block drivers side there will be a part no tell you about the block also the Version mine ends in a D which means it was 1 of the latest made
Tighe cams have a few blanks roller & other also Brett Miller can supply