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thanks guys! think you all pointed me in the right direction. i got back on rockauto and found a master cyl for a 73 duster, manual brakes-front disc, rear drum made by raybestos. its brand new for 60 bucks. would that be what i need?

and another question, do i need a factory type prop valve? the car has a line lock for the fronts which i need to replace, and the line coming out of the line lock goes to the left front wheel where it is tee'd to the right front wheel. for the rear, it just comes out of the master cyl and goes to the back of the car. is there a need for a factory prop valve? or even an adjustable prop valve?



You wont want the factory prop valve... but you would
want the adjustable prop valve.... reason is you
arent using the factory sized tires and the car doesnt
have the stock weight balance anymore