Looks like that bushing is way too small for the later engines:
the .781" bushing OD is smaller than the .791" late shaft.
I looked around to see if there were some common pin bushing that might work, but most have at least 1 dimension off. Looks like the closest common commercial size is a 7/8" × 1/16" wall tube = .750 ID, ream or hone to .792" (or whatever cleans up your rocker).
