That’s an awesome build… I’m presuming you’re Weiand intake is a 7510 or a later 7545. That would be the definite winner in this application. One member here swears by this Howards mechanical solid flat tappet cam. With 420 cubic inches, you can expect the rpm rating to shift downward by at least 1000 rpm. Howards Cams 712532-06 Howards Cams Mechanical Flat Tappet Camshafts | Summit Racing
