speedway motors electric brake kit

Anyone have eny experience with the speedway motors electric brake kit?

https://www.speedwaymotors.com/Elec...er-Cylinder-Install-Kit-Disc-Drum,456527.html
I did a quick search but all it came up with was a for sale ad for a 71 demon

My car, 71 duster, has no room for a brake booster, and with the 451 and the through the inner fender headers there's not much room for anything up front.



Any advice, ideas about where to put the booster are much appreciated.

Thanks!