I have a 64.5 mustang coupe 4 speed 289 hp came with factory brake booster and single brake master,trying to find duel master cylinder that will fit in place of single cant be over 6" long any body ever ran into this problem the only thing i can seem to find is a conversion .i don't need a conversion just a master cylinder so it dosent hit shock tower want to figure out,before disk brakes are installed on front,answers would be a great help.