I would run stock rockers with that cam. Stock pushrods too if the heads/block haven't been milled that much. Like I said, I ran stock pushrods and rockers with a lunati voodoo 60303 cam which is a little smaller than the one you have. May make a difference that my rockers were off a 76 440, which some guy says the later 440's got the same HD rockers that mp sells now.

However I would sooner put that money towards a set of ductile rockers and new non-adjustable pushrods than spend it on adjustable pushrods for stock rockers. If you can reuse all your stock stuff, that's one thing, but I wouldn't invest into it.