Questions about valve stem seals

I'd just go on RockAuto or to NAPA and get the stock Felpro seals. Your engine has plenty of age on it and just getting anything in there will help any oil down the guides!
Agreed. I'm just going to get Felpros from Napa. I don't think my 52 year old stock 273 needs anything high performance. If it ever does get on the road, It won't see more than a few hundred miles a year.