Wetwilly,
The electric shift on the rear indicates it's an Eaton Rear which was optional...has nothing to do with the transmission selection.
The Clark trans didn't show up in Chevrolet's until 1959.
The optional 5-speed for the 1957 6000 series is the New Process trans, they got the SM420 4-speed as standard issue.
FlyingZebra...my guess is you'll spend about $750-800 for a complete brake system with you doing all of the work. You don't want to do it half way...replace ALL of the steel and rubber lines as they rust and break down from the inside out. Rebuild the Master Cylinder and Hrdrovac. Buy new wheel cylinders and lines, re-line the shoes and turn the drums if needed. Don't forget to check the bearings and put new seals in while you have the hubs off.
Mike B
