I just bought a engine from a guy for $75 dollars & he said that its a heavy duty 350! I checked the motor visually & it looks pretty good but its caked up with a lot of gunk & grime on the intake manifold. The manifold is a cast iron 4 barrel manifold for a quadajet carb. The heads casting # are:
333882
The block casting #:
330817
Can some one tell me when this motor was made?
Thanx
njdaewoo

 

The heads are 76cc chamber units from either a 350 or a 400 anywhere between 1974 and 1980.

The block is a 2 bolt main cap 400 CI anywhere between 1972 and 1980.