I tried vacuum brakes & went back to the PM.
With a daily driver, you'll have problems when pulling out into traffic from a side road. The braindead about 100 - 200" farther down the road trying to pull out into traffic with a SUV or an "economy" vehicle will also pull out because you did. In about 100' you'll be doing better than 45mph & have maximum boost when you suddenly notice the braindead idiot now has blocked the road in front of you. Since you are at maximum boost, you'll have no vacuum to enable the vacuum brake booster to function.
Another problem I encountered with 4 different vacuum brake boost units, was they all developed leaky diaphrams (they were lifetime rebuilds). The leaks would constantly vary due to the use of the brakes moving the diaphram. The leaks in effect made setting the IAC impossible. My last unit was leaking so bad the engine idled at 2k, which on the highway in OD was 70mph. It also would not idle when encountering a stop lighr (RED LIGHT), which caused the engine to die at all of them - remember with a bad vacuum leak in the booster, you ( well I did) need both feet to hold the brake.
I was working on a vacuum booster pump to circumvent the first problem, but gave up on the leaking diaphrams.
Third problem was cost: I spent $50 for th junkyard parts, $50 for a rebuilt master cylinder, $90 for a rebuilt vacuum boost unit, & since Casper hadn't come out yet with the aluminum vacuum block, another $70 for a TA vacuum block.
The lifetime warranty PM cost $199.
LOL
