Just an update, I did finally replace the heads (found them for $100 bucks on CL). Truck runs fine now. If you do tear all that apart, remember to put the wire guides back on. Burned the #5 plug wire on the manifold Oh well, live and learn. BTW, I'm guessing that it was a bad spring that was the cause of all this. The heads were freshly remanned, so new springs and such.