[Lemans64]

Have seen issues as u describe, runs great when cool or short trips, extended trip it will start to sound like noisey lifter then develope into an engine miss, and after some cool down or some idle time problem will dissappear. Carboned up exhuast valves, carbon builds up on the valve stem and gets past the carbon relief on the valve which causes the valve to stick in the valve guide when hot, causing lifter noise and engine miss, after cool down problem goes away. There are some injector flush chemicals u can spray down the intake to try and loosen up, but permanent fix is to remove heads and clean valves and guides or have valve grind done. Just my opinion though, u should have a professional drive it and give their opinon.

Rick

[PonchoV8]

It's a recent rebuild though. I don't think there's more than 3-5 thousand miles on the build. Regarding the oil pressure, I still have to correct the pegged needle issue. It's grounded. Someone hacked in the cluster with an aftermarket unit that also pegged hard--I just installed the correct one and it pegs hard as soon as the ignition is turned to ON--without starting.
Soooooo, I believe there is enough oil, but I have a bastardized dipstick and tube I'll have to check on too. It's still got the 4 row radiator.

Too many gremlins and Chevyguy mods right now to even know what I'm getting in feedback from the car.
This car only likes 40 mph and under.
TO DO LIST:
(1) fuel filter
(2) correct oil pressure gage
(3) correct water temp gage
(4) oil tube and dipstick
(5) fuel vent