I recently installed a set of pedals on my hotrod frame the pedals were given to me and were believed to have been on anford truck i purchased a master cylinder with the triangler bolt pattern, but the pattern on the bracket was slightle larger so i returned the cyl for a 1 ton truck cylinder and the pattern was too large for the bracket so how many triangle bolt pattern master cylinders were they. on theese pedals the master cyl bolts to the front side of the bracket.
did you get a master cylinder with the pedals at all? they all have casting numbers that can be cross referenced through wagner or raybestos. i'm not sure what you mean by triangular bolt pattern; most Fords have either two bolts, one each side of the bore or four, two above and two beside in some cases.