I'm converting my car over to manual brakes this season. Setup is already four wheel disc, but getting different front calipers.

• Rear calipers are single piston, 2.544 in² area with 11" rotors
• Front calipers are four piston Wilwoods, with 4.8 in² area with 11.75" rotors
• Brake pedal is the factory power pedal with a 4.5:1 ratio

What bore master cylinder should I be looking at? Should I also be looking for a pedal with a higher ratio? These cars were offered with manual brakes earlier in the model line. I've got to assume the pedal ratio was different.

Thanks again Moparts!