[cadillac_al]

Sounds like rusted head gaskets then. My truck used to have a hot engine but I wasn't using the extra power so I put the stock heads back on it. If I towed more often in mountain country then I may have appreciated the extra power. My stock engine will haul cars easy enough for me. You could be back on the road for the price of some gaskets. I do like mild rv cams in a stock chevy 350 for a few extra ponies. The stock cams are just too mild for me. I say go ahead and upgrade the cam and throw some new head gaskets on it.