Slant six dies in gear

Bugman said
1976 emissions manual certain six and 318 were manifold vacuum advanced from factory.Worked fine but carb and distributor had to be right part numbers. Dist for ported would not work too well with manifold vacuum carb, base timing different 76 emissions and TSB,s - Slant Six Forum

Thanks Bugman.

Be nice to see the rest of TSB 25-05-76
Looks like may have been a mid year change back to ported with substantially increased initial timing. Need to see the rest of the details to know for sure.