I,m in the process of prepping a pair of c9ve 460 heads. I'm starting with some pretty rough empty cores. my guy thats doing the porting wants hardend seats installed. The machinist doesn't recommend them on an engine that has any chance of seeing water in fear of them popping out. being wet headers with some cam,theres some risk.
after the valve grind theres still some small pits & some rust stain on a couple of seats. the machinist say's there not pretty but they'll be fine.
so the question is ,do I go with the guy doin the porting & get the hardend seats or do I not take the risk of them popping out ,like the machinist says and run the "not so pretty" freshly ground soft seats? the heads are 40 years old & this boat does have a budget .