Mopar 557 cam

That purple camnisnin and he old speed tips section stating it is good for a 11 second engine when properly equipped. They recommended ported heads. They listed there own head which would be a ported factory head they used to offer.
The Purple cam I think is on a 110 designed to be installed at 108.

The 2 cams, rpm wise should be about the same in there rpm spread, beginning and end.

Ether way, I myself would run a 1.6 rocker.

How well do the heads flow and there percentages between intake and exhaust ports?