Another “which camshaft” post

Although I see nothing wrong with your choices and many of the suggestions, I know from experience that the Comp Cams Dual Energy 265DEH works fantastic in such an application. It is designed for minimum mods, like no deep gears or stall converters, and was intended to help vehicles with exhaust manifolds (split pattern). It is ground on a 110LSA to keep torque and cylinder pressure up, unlike wider LSAs. Has a loping idle but basically responds instantly off idle. There are a few on Ebay right now, but Comp will grind you one at no extra charge, as it's an existing grind that they stopped shelf stocking (to sell Thumprs and Xtremes). #20-417-4 (used to be -3) is the part number.

Comp Cams Dual Energy Flat Tappet Camshaft Chrysler 273-360 C.I. 8 CYL. 1964-00 | eBay