I've always enjoyed spending someone else's money, I know a hydraulic roller is more money, and so is the retrofit kit for your block, but I sure do like the way the right hydraulic roller works in an engine! I ran those same 781 heads on a 427 a couple decades back, with a bit of port work they do wake right up! If I recall, Mike (my machinist pal for 50 years) spent a bunch of time on the exhaust ports and a bit of match porting to a Weiand oval port intake. Just my ideas on how to spend your bucks!!!