yet another 1953 chevy question

does anyone have a 53-54 chevy belair with a mustang 2 front clip, and a sbc drive train? if so does anyone have a master/booster frame mounted ? I am just wonering if it will fit or work? and where the hell to buy one. The ones I have been looking at look all the same to me but range from 275-599. Thanks

 

I have a 54 with 327. The previous owner mounted the master cylinder on the frame directly under the driver floorboard. Its a pain to get to but there is access to it from the drain plug in the floorboard.