no provision for fuel pump on can am and syiamese cylinders, made the motor quite different than zl 1 motor, which was basically a alum L88, can ams like to overheat real quick cuz of cylinders and they had cast iron sleeves so they held the heat too, I read jenkins car in 67 had an alum can am, and their are tests from gm on them from that year, they would have known long before then they weren't good street motors especially in traffic, maybe just had zl 1 052 motors, they would want to test them and have emissions tests approved in advance of when production was to start I think
