Difference in Distribution Blocks

Difference in Distribution Blocks

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lhearold said
Its not a proportioning valve. It has the holdoff feature for the rear brakes. This allows the front to begin to take hold before the rear and lessens the tendency to lock the rear brakes. It will work on either drum or disk without a problem.

Larry

According to the 72 shop manual, it IS a proportioning valve, or more correct a combination warning switch/ distrbution block and proportioning valve

In 70 a separate proportioning / metering valve was used downstream of the metering block. Some stuff from the 72 book:

Some cars in 72 also used a combo dist/ metering valve instead of a prop. valve