This year I did a roller cam swap looking for added bottom end torque (had to use too much throttle to get it moving, had no lower rpm control) I bought a Crane 276 roller from Chris (38377k5) and installed it advanced 2 degrees.
While changing the valve springs, I heard alot of air escaping through the exhaust. Desided that the head had to come off to check exhaust valve.
After inspecting the valves (and trying to lap them in) only 3 cylinders were sealing properly. Started to look for replacement heads.
This was Friday before Labor Day, sopposed to leave in 4 days for the Bash.
A friend of mine pulled some favors and had a shop redo my heads in less than 5 hours. Dropped them off Saturday morning at 8am picked them up at 1pm.