That's what I was thinking. I don't think it will be that critical for what I'm doing. Rarely if ever will it see much past 5,500. I do have ARP rod bolts on hand that I'm thinking about having installed when I get the rods done.

My next question has to do with the headwork. What would be the bare minimum for this? My stock 906s have the high performance "Magnum" valve springs. Do you think those will suffice? The engine will have stock type cam. Also, the original valves? Can 50-year-old valves live to see another day in this type of application?

Also, forgot to mention, this is on an engine with 98,000 miles, which I'm inclined to believe is accurate.