camaro8484

Alright guys, buying a 87 z28 off of a guy he got it with a 350 already swapped in. This is what he says. It ran when he got it. Had a different cam put in was driving it, "playing" with the timing a lot just by the distributer never actually had a light to it. Said he took it out then it stopped running. Now it's very slow cranking. I'm figuring possibly to much timing? What's your opinions on it thanks! 87 z28 swapped 350 carbed. 5speed.