thank you guys for all the input, tomorrows agenda is draining and pulling the gas tank.

The two valves are soaking in seafoam and PB blaster tonight and I'll see what kind of action we get tomorrow.

Worst case scenario I pull the head and freshen it up. The truck has been sitting for an absolute minimum of 3 years, likely much much longer. I wasn't expecting every thing to go smoothly.

Would it be a bad Idea if I got it running on 4 cylinders again and ran some seafoam through the top end?