We start with a Clevite 77 # CB663P-STD standard size rod bearing and clearance chamfer cut it to fit large fillet radius cranks. Fits small block Chevy large journal (2.100" rod journal) crankshafts.
Clevite's H-Series was developed primarily for use in NASCAR type racing, but they are suitable for all types of competition engines. These sets are for 1970-1980 S/B Chevy 400 c.i. V-8 engines.
H-Series Features (Link)