Purpleshaft .484 Cam in a 273?

Motor would be basically hot street/drag.
Well, then you could maybe get away with a higher gearing, higher stall TC, and go with a bigger cam. It does not sound like you are too concerned about nice low end torque and pulling away smoothly from a stop sign... .more like tearing out from a stop sign, tires smoking every time LOL. I'd still be upping the CR though....