It's possible it has a hydraulic cam which could tie in with "ol 55" reply above. Can you share the stamped serial number so we can try and check what it may have come with originally? headscratch

Edit: Is it possible the engine is this one that you also asked for help ID'ing?

Last edited by Gdads51; 11/17/2024 5:02 PM. Reason: add edit note
~ Dan
1951 Chevy 3 window 3100
Follow this story in the DITY Gallery
"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)