Brake system help

[Hugger67RSSS]

My 68 currently has C6 Z06 brakes front and rear with a manual wilwood master that is bolted to the top hole on the pedal. (6:1) ratio. I have a non floating moser 9" rear with new style Torino ends. I have knock-back problems during autocross. Bled brakes at least 3 times. Works perfect on the street.

I am taking off the Z06 brakes and have a set of Baer 6S front calipers with 14" rotors.

Are there any floating calipers for the rear that would help with knockback issues and still match the piston sizes and rotor size of the front brakes with my master size? If not I will change masters.

Front Pistons are 1.62,1.37, and 1.18.
I have read about the wilwood D154 rear brake kit and know others have had good luck with them.
http://www.wilwood.com/Calipers/Cali...ston%20Floater
Or could I use a Z51 corevette rear brake setup since it has a larger rotor?
Any and all help is appreciated.

Aarik