[Rich Biebel]

I always thought the early Chevy II motor was the same basic block as the later Iron Duke.....

Pontiacs used the Duke and I changed a lot of blown exhaust manifold gaskets....The first ones in about 1977 had both intake and exhaust manifolds on the drivers side. Seemed to me like the heavy weight hanging on one side was making the maniofld gaskets fail.....
The next model year had the "crossflow" head......New and improved.....Right......

Boats used that 4 banger a lot......Mercruiser 120 I think it was....

I have seen some small standby generators that had the same basic GM 4 banger......and the castings usually say Hecho in Mexico

Generator builders used many common GM and Ford engines long after they were not used in cars anymore.....

Big and small block Chevs.....and Fords.

Add a small turbo and boost the HP for greater output.....