Cam advice for ill advised 318 combo?

moper said

MP thin head gaskets, the Summit "small" camshaft, cheapie small tube headers. If you want a little more romp the Comp Magnum 270S would be fun.

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Summit shows a 272/272@454 lift. Do you mean this one?
I looked for the Magnum 270S...It comes up a SB Chevy cam??
Camquest gives me 2 at the bottom (most conservative?) 262/270 @462/470 and 268/268 @454 is the split pattern better for my bigger intake valve than I need VS unported exhaust?