Pick a cam for me

Howdy all. I posted this question some time ago, but i have since made changes. Here is what i have:
78 police 360
Re-ring the original pistons, factory 72 340 intake, thermoquad carb, windage tray, factory heads with 3 angle valve job, 340 valve springs, factory exhaust manifolds, 323 gears, od833 four speed. Looking for 300 hp. Going in a 76 swinger.

also should i get moly rings or standard? Thanks!