@ the time of the valve job and other work the guides were milled and cut down to accept Viton seals. I don't want to swap to longer valves now. Will just make the most out of what I have. Originally was going to go w a MP .509 so this was not an issue. The exhaust #s are a little low so a duel ramp/duration would be a better choice.
Do you have viton seals on the exhaust side too? I always ran basic umbrella's on the exhaust side. Those guides get a lot hotter then the intakes so they actually like a little oil, plus there's no vacuum there.