360 Magnum Build w/ V Belt Configuration Question

There should be no real issue running anV belt configuration with the magnum engine. The best way to get everything in line is a total swap over to the LA front. Use the timing cover forward.

The short cam poses a minor problem with ether a cam nose extension from Hughesengines or a swap back to a Hyd. cam. Personally I’d stay with the roller cam, though expensive by itself, you just reuse the OE roller tappets and maybe a new set of pushrods. That depends on the ew cams lift. Just remember LA Hyd. cams are given lift values at a 1.5 rocker ratio and the Magnum has a 1.6 ratio.