When selecting a camshaft the first thing I consider is how much do I want to spend on valve springs.
Most fully assembled aftermarket heads include valve springs that can handle up to .550 lift.
So I will choose a camshaft with around .510 lift with stock 1.6 ratio rocker arms.
That way if I choose to switch to 1.7 rockers I’ll still be under.550 lift.
I also prefer camshafts with more lift and duration on the exhaust side.
1970 Mustang coupe