[carbide]

I bought a set for my 428 CJ many years ago (about1995)when they first became available. I sent them to Engine Systems in Atlanta for a valve job and to make sure they were good before I installed them. Last year after 40k miles I had the engine rebuilt and I had the heads CNC ported, all new titanium locators and keepers along with larger valves and new springs. They have 3500 miles on them and so far working great. BTW the engine made 585HP and 564 Torque. I have the Dove tunnel wedge with 2 ea 600 Holleys.