318 roller motor & magnum head swap

Look up lifters on your favorite auto parts website for both engines and see if they are the same part number, of course it doesn't necessarily mean anything if they're difference but if they're the same, then you know for sure. Pretty sure they are the same...

1Wild has good advice about the pushrods. Just get the ones from the Magnum (or some stock Magnum replacements-cheap at Summit) and you'll be gold.

Sounds like fun, good luck