Need A Recipe For A 273 Rebuild

toolmanmike said
Oh yes but with some simple performance upgrades like cam, headers, carb,and valve springs the little 273 evolved into a 1hp/cu. in. screamer. Will it make 500 hp? I doubt. Call me old fashioned but I would rather have a 300 hp. 273 than a 400 hp. 360. toolmanmike

There is nothing simple about headers in an A-body.
A 360 can produce more hp and torque between stock manifolds, plus perform street friendly at any rpm range. I shouldn't knock the 273 since I own 2 of them but even ma mopar found a better way.