1973 barracuda.

Parts :
Prebent brake like kit from Inline Tube
Using metering block Inline tube recommended for 4wheel disc
Using manual valve inline recommended to set bias to rear
Stock style master cylinder and booster
Front - Stock style calipers with 11 rotors
Rear - aftermarket conversion kit thAt uses gm eldorado style calipers

I have bled the brakes and all wheels have fluid.

Issues :

No braking at the front
Tight drag on the rear.

Questions :
Will the stock style booster/master combo work with 4wheel discs ?
Is there an adjustment on the rear to reduce drag?

Thanks !