First off let me give you the link to this super handy PDF master
cylinder identification catalog from Cardone that has pictures, bore diameter and fitting specs. It is a little over 21MB so it takes a second or ten to download.
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The master cylinder I use on my cars in place of the 10-1571 is the 10-1945 (less reservoir) 13-1945 (with reservoir) for the 89-94 Shadow and others which has a smaller bore of .827 giving you a better hydraulic advantage when the power booster is removed. This does require swapping out fittings or using adapters. I also am finding that instead of forking over for the high dollar adjustable rod that a much cheaper aluminum spacer will fit on the Mopar adapter with the long studs and set the proper length to draw fluid. The other thing I would mention that you may not know is that in 76 the single piston caliper piston size was increased from 2 19/32 to 2 3/4. By swapping to the larger piston calipers you can further increase your hydraulic power and advantage. The A, F and M body cars still use the D84 pads and so called 11" rotors but you will notice part numbers for calipers, kits and pistons are different from 76 up.
