Sure you can buy today's cams with that lift/duration and drive around with a 4:86 gear but it ain't fun. 273 is a little motor and I think piston are expensive, better off building a 408 stroker and smash 'em.
It's just a 360 LA with a 4" cast crank all from Mopar, Wouldn't need a tall gear to drive around and a .500 lift cam might even idle decent. Nothing beats cubic inches as they say.
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