I just bought this car for $800 USD, and it is currently nt running. It keeps backfiring through the intake, I was told that the timing has slipped. When I checked the timing belt looked new and I think the idiots just put the belt on and expected it sto start. So I placed the cam gear arrows facing each other, but now the only problem is I don't know how to line up the crank pulley. There is a spot with 3 marks and ten another with 1 mark. I just need to know which one is supposed to point up.

Oh, and when it turns over it sounds like it's spinning very quickly