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How do I figure the bore size I need?
You need to figure out a little more than just this, but start by contacting Dr Diff. You can find him on this site.
With manual front disc brakes, you need a master cylinder that gives you a hydraulic advantage or your pedal will be real hard to push. You can accomplish this by using a master cylinder with a small bore that still has enough volume to poperly activate the brakes.
Dr Diff can tell you which one, or just ship you the right parts to finish your conversion correctly and safely.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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