Vacuum Reservoir can for brakes. SIze needed?

[LowBuckX]

Im going to make my own is there a specifice volume it needs to be. IE 2 Qt
3 Qt... I want one that I can hide easily

[pitts64]

Summit sells a very nice can for 30 bucks.
I have one on my ram air 4 cammed 462 and it works great.