How can i tell if i have underdrive pulleys installed or not?? i know this may be a stupid question but it appears that underdrive pulleys are just different size than stock pulleys and if i dont kinow what size the stock ones are how would i know if i ahd u/d's installed??? I have a 93 5.0 lx vert any help would be appreciated. THanks

 

if you have underdrives the water pump pulley will be really big and the crank pulley will be small

 

Yeah, the water pump pulley will be REALLY big.