I know there has been a lot of discussion about boosters for these trucks. I bought this one off Ebay for $225.00 delivered. Am very impressed. It bolts into the old master cylinder holes and to the frame. Has a bell crank installed to correct the pedal throw. The mounting brackets are 1/4" and 3/16". Has the correct combination valve for disk/drum or disc/disc, your choice. does not stick out from frame any more than stock. Includes a brake light switch. Definitely worth a look if you are doing a conversion.