My Transformation 5.7 Gen 3 in 74 Dart Sport

So the 5.7 I have came out of an auto, and the 6.4 cam I am entertaining putting in is a 419AB stock 6.4.
So here again, if pulling the valve cover is as deep as I would have to go, minus the front end for the cam swap, I may be in. But I’m not to interested in pulling heads on a fresh motor just yet. Would rather just hold off until I do the lifter rework and make other modifications at the same time, cam included.....

Thoughts?