bad cam shaft?

[camjck89]

so today i went by to drop off my mirrors at the glass shop and on my way home i stopped by a little shop a co worker told me about. i wanted him to take a look at my quadrajet and tune it , due to the bogging issue when i hit the gas too hard.after listening to him bash the carb rebuild done on my quadrajet he said that it was the least of my worries, said i need a new motor, that this motor had a intake valve leak, and that the valves were possibly tightened too much that could cause the motor to pop back through the carburetor. then he said that the motor probably had a ton on miles on it (the inside of the valve covers are spotless. and it was family owned and told it hadn't even turned the odo over so they ere origional miles, 87235) and the camshaft lobes were most likely worn. so i diddnt know to believe him so i ask you guys, it this fixable through a new camshaft and pushrods and valves? if not what, is the motor just better off being rebuit?