Just a suggestion- - - - -unless you're planning to do a lot of full throttle running while pulling maximum gross weight loads, using Stellite valve seats for the exhaust valves is just an unnecessary expense, and runs a risk of cracking a good head while they're being driven into place. A safer, less expensive option would be to install stainless steel exhaust valves for a small block Chevy V8- - - - -they have the same dimensions as stovebolt exhaust valves, and brand new ones are dirt cheap on Ebay.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!