Those heads are late 406 heads with tiny 56-61 cc chambers. They were also used on 390's with smaller exhaust valves. If they are 406 heads they will have 2.02/1.64 valves. If they are 390 heads the 2.02 and 1.55 were used. Just keep in mind bore notching might be needed if you use the larger CJ size valves. Just match the valve springs to whatever cam you choose. The crank and rods will be fine. You can upgrade to ARP bolts for the rods. Those shorty cast headers are getting expensive. I sold a set for $500 last year and prices seem to be holding around the same money. But they are much more original looking than the Tri-Y's.

G.