Have a 1968 Alexis MK14 Formula Ford. The car came with Girling 12SP calipers on the front and Girling 14LF calipers on the rear.
We have changed out the front calipers with 14LF so we now have the same 14LF calipers on all corners. The 14LF calipers have larger diameter pistons than the 12SPs.
However, the master cylinder for the rear is 3/4 diameter and the master cylinder for the front it .670 diameter.
What size master cylinders should be used in order to have appropriate break bias with all four corners now having the same calipers? The car has a cockpit adjustable brake bias adjuster.
Should the master cyliners be swapped so the smaller unit is on the rear and the larger on the front? Or, something else?
Thanks for your insights. We're getting ready for Mid Ohio later this month.