This really sucks...

I got my 66 Barracuda back from the shop a couple of weeks ago - not running. This really sucks, I was expecting to be driving it by now. A couple of days before I was supposed to pick it up, the shop who did my transmission conversion and installed the engine told me the engine was running great, everything was working good... then the day I'm supposed to pick it up they call and tell me something's wrong with the engine. Get engine builder to come by the house to take a look and almost all the valves are sticking. "Could be caused by bad gas" in which case I'll have to pay to get it fixed. WTF??? How come no one told me this could happen? I mentioned to the engine builder that the car had been sitting for a few years, no mention of draining the tank. The shop that did the conversion - they were told too... in fact they couldn't get the car started until they removed the gas line from the tank to the carb and blew it out. Another clue to the experts I hired that maybe something was wrong with the gas in the car??? Some of my friends said I "should have known" to drain the tank after the car sat for so long - but I didn't, and that's why I hired experts - to make sure everything went OK. It seems like - at least this time - hiring the experts didn't help all that much.