I run a Willwood set up in my car. It is the earlier style pedals with cast grips rather than the later black and sandpaper jobbies. The instructions with them are really good with all the dimensions shown clearly. All I did was cut the lower section of the original pedal box and welded a plate 3mm thick to the remaining two legs. I had drilled multiple mounting holes in the plate prior to welding to give me some adjustment. I can get a shot of the mounting plate but not with the pedal box since I have'nt replaced it after it being stolen out of the car last year..I also ran two rose jointed support rods from the rollcage cross tube that runs behind the dash to avoid any flexing. They are bloody good units and also offer a great tech support to help with master cylinder sizing and caliper compatiability. I run 2 7/8" m/c and have two set of Superlite calipers with different size pistons for differing set ups but I have stuck with the 1 3/8" pistons so far. The pedal travel is short but really good to drive with. I have copied the Willwood pedal boxes several times when building them for other people.