Sachs NFW1040 Clutch Flywheel 14" 2-Pc Rear Main Chevy GM 400 SBC 6.6L 1976-1980 New Parts This particular Reverse lock valve

This particular Reverse lock valve assembly was generally found on MerCruiser Inline Engines 1970-1977 120hp 2

Part number 1998570

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

7L 350 - Models WITHOUT Power steering-RARE

This one mounts with rivets or screws from the top

Sachs NFW1040 Clutch Flywheel 14" 2-Pc Rear Main Chevy GM 400 SBC 6.6L 1976-1980 New Parts This particular Reverse lock valvePart 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