Hey, guys. I know, another hydroboost thread. So far, I have bought 2 1998 Mustang hydroboost units, one with a M/C, one without, and a hydroboost unit from a 1976 Lincoln, no M/C. I've also bought a M/C from a 6cyl 1998 Mustang, thinking I could use it on the Mustang hydroboost, and a M/C off a 2003 F150, but the "register" or stub on the back of the M/C is bigger than the hole on both the Mustang and Lincoln hydroboosts. So I got a analog/dial set of calipers from work to measure the M/C registers and HB recepticle/holes. About 2mm difference is my best guess (the measuring points on the caliper were too short to go over the HB push rod.) Now I'm looking at the Superduty HB from a 1999/2000 since it has been said you don't have to mess with the pedal rod length. I looked at RockAuto and saw they don't differentiate between M/Cs for gas and diesel models, so off to the JY I went. There weren't any diesel superduties (didn't expect there to be) but when I tried seeing if the F150 M/C would work on a gas superduty, the superduty M/C register is HUGE. But looking at the back of the M/C and the length of the HB push rods I already have, they look like they would be right. I'm gathering all my parts to do a 4 wheel disc conversion, and really would like to use the F150 M/C. Do I just need to buy an adjustable push rod and a spacer? Has anyone done what I am trying to do? The reason for the F150 M/C is it has a 1-3/16 bore and has the provision for the cruise control plug. Down the road, I plan to do a full Explorer 5.0/4R70W swap, and would like to try to make the cruise control work. Apologies for being so long-winded... Any ideas appreciated.