i work at a machine shop and i am looking to make a set of underdrive pulleys any one out there by chance know the sizes of the stock pulleys and bolt patterns or have a set of underdrives on their vehicle now to give sizes of underdrive. if i can get enough info i will start selling them. bout $100.00-$120.00 bucks with custon designs milled in the pulley. please email me at [email protected]. thanks for your time.