PR-107
GM A-body Distribution Block
Applications:
1970-72 Chevelle / El Camino - 70-72 Drum & 70 Disc Brakes
1970-72 Pontiac GTO / LeMans Tempest - 70-72 Drum & 70 Disc Brakes
1970-72 Oldsmobile Cutlass / 442 / F-85 - 70-72 Drum & 70 Disc Brakes
1970-72 Buick Skylark / Gran Sport / GS - 70-72 Drum & 70 Disc Brakes
1970 Chevrolet Monte Carlo - 70 Disc Brakes
1970 Pontiac Grand Prix - 70 Disc Brakes
Brass
$79.00
Valve Notes:
Now available the 1970 disc/drum and 71-72
drum GM
A-Body (Chevelle / GTO / Cutlass / Skylark) Distribution Blocks. This block was
used on all 1970 cars, either disc or drum, and 1971-72 drum only cars. The disc cars
went to a completely different valve. This block is located down on the frame
below the master cylinder. This is not a proportioning valve; it does not hold
off pressure unless there is a loss of pressure in either the front or rear
brakes, then it will contact the brake warning light in the dash.
In 1968-69 and
70-72, this block is used on all drum cars and in 1967-70 with the round hold-off
valve at the master on disc brake cars. In 1971, the disc brake cars use a
different valve and the drum brake applications continue to use this valve. This
block gives equal pressure to the front and rear brakes and is also great for 4
wheel disc applications. 1968-69 and 70-72 are very similar valves except the
fitting sizes change for the different year brake lines.
This item is an exact reproduction featuring a brass body, the correct bracket,
gold plating and working insides. You will also find with current manufacturing
procedures, the reproduction has no tool stamping marks and the edges of the
part are much cleaner than the original.
GM Notes:
1967-70 cars all came standard with a dual master cylinder and
drum brakes, and 1967 was the first year for optional disc brakes. If the car had
either drum or disc brakes, there was a distribution block with a built-in brake warning
switch down on the frame below the master cylinder. From 1967-69, if the
car had factory disc brakes, it used the drum distribution block in conjunction with a
disc brake hold-off valve, which made the disc cars a 2 part valve system.
In 1970, GM added a third valve in the rear line for brake correction, so the 1970
system had three valves. For cars converting to disc
brakes, replacement aftermarket 1 piece valves are also available. Conversion
valves will not plumb into existing factory lines.
Prop. Valve Brackets are available for all cars with disc
conversions, this bracket is $18.00.
