360 Magnum Build w/ V Belt Configuration Question

For cylinder heads, there are available for you in;

Iron, stock replacement style.
Once such example below, do shop around though.
CHRYSLER 5.2/5.9 MAGNUM New Full - PROMAXX Performance Products

Edelbrock aluminum for the first step up in performance.
Edelbrock Performer RPM Chrysler Magnum Cylinder Heads 61775

Trick Flow heads that will then use a LA intake but yet you will still be able to oil through the pushrods with the correct Harland Sharp rocker arms.
Parts and Accessories - cylinder-heads part-type - trick-flow-powerport-190-cylinder-heads-for-small-block-mopar product-line

You can also use Comp Cams Pro Magnum rocker arms to use oil through pushrods on stock or Edelbrock heads since they allow pushrod oiling. The last two options allow the use of cheaper & a wider verity of LA intake manifolds.