My Dart Swinger Project!

Out of curiosity. I know that the magnums oil the top via thru the pushrods. What would you have to do to put la heads on a mag to get oil? Is it as simple as using mag pushrods?
That could be a possibility if I could get a cheap magnum i could still use my 302 heads my 340 intake. Save a bunch of money on a magnum intake. If it doesn't cost a bunch to make the head work of course.
Oil la heads through the push rods?