Help me put "587" heads on a 318

Valve springs, if red 340, are good to go, new is a waste of money. Good valve job! Replace the exhaust valves with stainless ones if worn. Intake valves should be good. Mill .04 off the block side .038 off the intake side. Tighten up the guides, knurl or line, and use Viton valve seals. Use spacers under the rocker shafts to use stock pushrods.