1967 Mustang 390 v8 GTA coupe. Just got it running. Horrible belt noise! I think it is the belt going from the AC to Smog Pump to main pulley. There are no other devices on this belt. The smog pump does have a vacuum line going into the top of the intake manifold. Can I pull the belt off and run the engine. I have a belt ordered but it will not be shipped till the end of Feb.