Sachs NFW1040 Clutch Flywheel 14" 2-Pc Rear Main Chevy GM 400 SBC 6.6L 1976-1980 New Parts but I have 2 of

but I have 2 of these and the other one is exactly like this

Starboard Head 307711 0307711

This one mounts with rivets or screws from the top

Usually best to just replace your carburetor with the one that has the same number stamped as yours

Sachs NFW1040 Clutch Flywheel 14" 2-Pc Rear Main Chevy GM 400 SBC 6.6L 1976-1980 New Parts but I have 2 ofPart Number(s) Included Sachs NFW1040 Flywheel (For Clutch Applications) 14" Diameter 168 Teeth 3. 5" across for the crankshaft stud holes 2 piece rear main seal applications Other Related Part Numbers 3021600208 (replacement part number) V2003 (stamped) VF98017 (stamped) General Application Compatibility From what I could find in their catalog it was just 6. 6L 400 SBC applications 1976 1980 2 piece rear main seal engines. (which they all were during