Besides what George recommends on cams, do not lose sight of the fact that "little bitty 2-V heads" carry larger ports and valves than any stock SBC. They will work just fine in anything short of racing for money. I know of one Pantera running Aussie 2V heads and a hydraulic cam that was clocked at a Nevada open road event at 182 mph, right on the rear bumper of a 750-horse race-prepped Viper (to his great surprise).
It's just that the more showy 4-V heads had big-block-sized ports and valves in comparison to the much more streetable 2Vs.
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