[glennpm]

Hi!

Yes the power brake version, #101923, would work with the drum/drum setup you're planning to use. Do you have space for the boosted brake MC?

This MC has no residual pressure check valves within it. For drum/drum you would need a 10psi check valve in both the front brake and rear brake circuits.

If you decided later to add discs to the front and keep the current rear drums, it would work as long as you have disc calipers that are the same or very close to those used on an 1986 Chevy S10 Blazer, the original application for this MC. In this case you would need to remove the 10psi residual check valve from the front brakes and either add a 2psi valve or use the stock Chevy metering valve and also remove both the front and rear check valves. See attached article.

The article says, "The proportioning section controls the outlet pressure to the rear brakes after a predetermined rear input pressure has been reached; this feature is provided for vehicles with light loads, to help prevent rear wheel lock-up. The by-pass feature of this valve assures full system pressure to the rear brakes in the event of a front brake system malfunction. Also, full front pressure is retained if the rear system malfunctions". This is a good design however you are still going to get more brake pedal stroke or run out of it with your pedal on the floor if one of the circuits fails, as Coop has mentioned above with his drawing.

If you're set on going with discs, I would do this from the start and would I would keep the current rear drums you and your wife will be pleased with the brakes. Key to all of this is stay as close to the application MC and WC sizes possible.

Glenn