A hydro boost can be mounted in any position frame rails included.
A remote master cylinder is no problem but you should use a 1.125 dia piston power brake master.
The pedal feel is very light a touch of your foot on the brake pedal will stop most rods out there in normal driving.Its just like a Ford super duty with a diesel motor. As far as distance goes it would depend on what other baking components you have installed. A mid 80s corvette 6 piston caliper large rotor will stop like a super car with a hydro boost. I dont want to get in trouble with this site but you contacted me so www.tallonhydraulics.com
will help you find what you need and can build what you want just contact them through the web site.