416 stroker cam choice

Yes, less pressure. It is intake valve closing time that controls cylinder pressure. Close the intake valve sooner, create greater cylinder pressure. Overlap involves the intake valve opening sequence and therefore has little to do with cylinder pressure but a great deal to do with idle quality (as already said by roccodart440). If you have two cams with same duration and lift but different LSA, the cam on the tighter lobe separation will close the intake valve sooner and increase the cylinder pressure.

Larger cams generally delay the closing of the intake and then use more static compression to maintain cylinder pressure. Grab a bunch of cam cards and look at the valve timing of bigger and smaller duration camshafts. Looking at the intake closing times make things obvious.

This might help also..........

Technical Specs & Information