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Mark,
I saved several of the posts.Here is a copy of one of them.
You sure don't what that 1" on the rear.
This is from Rick.
Based on that information, with a pad CF of .3 (OEM replacement type pads), a 5/8" front and a .7 rear will give you 72 pound of force on the brake pedal for a 1G stop. A .4 pad (good high torque performance pad) drops the pedal effort all the way down to 54 pounds! That is nothing.
With a .4 pad, again, readily attainable, here is the pedal effort needed to pull a 1G stop (the most you can hope for on street tires, you will probably see less).
Fr Rear effort
5/8 .7 54
.7 .750 65
.75 .8125(13/16) 76
Try pressing on a digital bath scale and see what feels right to you. Keep in mind that with the .3 pads and a .7 and .75 master cylinder that your pedal effort if going to be about 87 pounds and that is pretty high. So, if you are sticking with stock type pads I would go with the 5/8 and .7 combination and if I was looking at higher torque pad, I would go .7 and .750. But that is just me!
Be aware that most likely your fronts are going to heat up much faster than your rears since you probably don't have much difference in the mass of the rotor. A pad that can take high temps would be a very good idea on the front.
Be sure and take the time to set the balance bar correctly once the pads have been bedded.
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