HERE IS A   NEW MASTER CYLINDER  WITH A DUAL RESERVOIR FOR  MANUAL BRAKES AND 4 WHEEL DRUM BRAKES 

1955 1956 1957 CHEVY HAS THE SINGLE RESERVOIR WITH THE SAME BOLT PATTERN AND PISTON HOLE ROD DEPTH AS THIS DUAL RESERVOIR MASTER CYLINDER.

PLEASE NOTE THAT ONLY TWO OF THE 4 ORIGINAL BOLTS WILL BE USED

 THIS  MASTER CYLINDER HAS A 1" BORE  AND A 1.60" DEEP HOLE FOR THE PUSHROD

 SAME BOLT PATTERN, BORE DIAMETER AND PUSH ROD HOLE DEPTH AS THE SINGLE RESERVOIR MASTER CYLINDER.

 THIS COMES WITH THE TWO BRASS ADAPTERS FOR 1/4" BRAKE LINES !!!!!!!!!

******* FRONT PORT IS FOR THE REAR BRAKES AND HAS A 1/2" THREAD *************

******* REAR PORT IS FOR THE FRONT BRAKES AND HAS A 9/16" THREAD ************

IF YOU WANT 3/16" ADAPTERS  , PLEASE PURCHASE MASTER CYLINDER FROM eBay item number:236431360287