Hi Denny and thanks for answering.
Quote Originally Posted by DennyW
How big of a canister.
I bought a Moroso canister whcih is approximately 2 quarts in size.

Quote Originally Posted by DennyW
Cruise speed is when the vacuum is the highest, so you need a checkvalve also to lock in the higher vacuum level until needed. .
I do have a check valve and yes, when I come off of the hwy, my brakes are fine but as soon as I do stop and go driving in town, I'm in trouble.

Quote Originally Posted by DennyW
A idle pulley will help keep the belts on. If the belt is stretched to far between pulleys, if will come off.
What I had was a newer Chevy aluminum bracket with the idler pulley etc and still no good. At this point I don't really want to try that switch over again. I have a small 4 inch drive pulley on my crank and I would like to keep that system.

I am wondering if I bought a diesel brake pump, Would it mount to my master brake cylinder and could I mount a v-groove pulley on that shaft? Are they interchangeable?
Thanks.