Richg_19
Junior Member
- Joined
- Jan 29, 2024
- Posts
- 1
- Reaction score
- 1
- Location
- Egbert, Ontario Canada
- First Name
- Richard
- Truck Year
- 1977
- Truck Model
- GMC K25
- Engine Size
- 350
Can anybody help me identify this block? It has a casting number of 3970010 which from what I found is a 327 or more likely 350 sbc. Stamped number in front of the head c54124227 k09 03 9l (the only number that’s not real clear is the c). I’ll attach some pictures below. Any help would be appreciated. We like to use this block for the rebuild on the ‘77 K25 as the original has the starter ear broken off.
