I agree with Lynn. XE256H is a very good cam for both 326 and 350. Building a 326 right now using that one. Will also use Performer and a 650 E-carb. Figures to make around 300 HP and 400 lb. ft.
The old Magnum grinds (what you list) are basically similar to Chevy small block grinds popular in the '80s. They've been obsolete for some time now. Pontiacs ALWAYS "like" a dual-pattern grind (more duration and/or lift on the exhaust side).