Good show- - - -it sounds like you've got an above-average machine shop. Hardened valve seats are sort of overkill, unless you're planning to do a lot of heavy load-pulling at full throttle. Most restoration jobs don't see the kind of abuse that requires hard seats, even with unleaded gas, but as long as they're installed properly, Stellite seats are OK. About the only time I consider them to be a necessity is on LP gas powered engines. If you're running a new cam and lifters, be sure to do a good break-in run before you idle the engine much. During the first 20-30 minutes of operation on a new cam it's important to run the engine at a fast idle or above to assure plenty of oil gets splashed onto the cam and lifters by the connecting rods.
Jerry
