well i took my air pump off the motor befor i droped it in the truck and i just got some underdrive pulleys and it came with a new belt......but its goin to be way big because i have no air pump. im using a v6 belt now and it just happend to fit perfect with no air pump but now with the underdrive pulleys im guessin it wont fit...does anyone knwo what size belt i need if i have no air pump and underdrive pulleys? thanks

 

Take a string and wrap it around all the pulleys just like the belt did, cut the string so the 2 ends meet perfectly. Take the string off and measure how long it is. Go to a NAPA or w/e and tell them u need a belt this big. Thay should be able to get a 6-rib belt in that length. Thats what my friend and I did to his 5.0 when its smog pump siezed.

 

I have the march crank and alternator pullies and a 935k6 worked with the belt being rerouted for the pump removal.