Yup yup, get the book and do it yourself. A q-jet was the first carb I ever rebuilt, with the book, I had it up and going the next day (over night cleaning), not a single problem - OTHER THAN - look at the picture posted by chipflyer. I once thought it didn't matter
But if nothing else, whoever did your carb slapped on a gasket kit and that was all I bet. I'm sure he's their 'go to' guy because he's the only one who knows SOMETHING about rebuilding carbs. There's hard parts (not found in your gasket kit) that should be replaced on a 30 year old truck, throttle shaft bushings and such.
Don't give up on that Q-jet. If you found someone to rebuild it who knew what they were doing, you'd love that carb forever.