I'm looking into buying their kit, was wondering if anyone had any and had any thoughts about kit? also any helpful tips

 

I have it. It's worth it for the bulkhead connections alone. Trying to use AN bulkhead fittings with the OEM bulkhead will eventually leak, Mine did and for safety sake I didn't want my FD to burn due to that. The surge design is great as well. I'm using just two "hellcat" pumps, one is the lift pump and one is the pressure pump. It's a tight fit with the fuel level sender, but I am very very happy with it overall. It's very well designed and thought out.

All of their parts are absolutely art work, one of the best FD specific parts vendors around.

 

How did you do the wiring for both pumps? I understand the wiring for the main pump but not for how the lifter pump is wired to the car.

 

"All of their parts are absolutely art work" agree, also note it is an important FD build item as i sucked air w 7 gallons of fuel onboard.

"How did you do the wiring for both pumps?"

Radium instructions are as good as their surge tank

https://www.radiumauto.com/Install-Instructions.aspx

i run a 274 lift combined w a 285 Hellcat and a 267 E85 pump. each have their own relay. my second drive pump enters at 10 psi.

 

I use two separate 10-gauge wires from the battery area to a dual 30 amp relay in the trunk, triggered by ignition on (ignition on wire comes from the main fuse box on the floor kick panel area). I keep the resistor circuit (now upgraded by a second parallel high-power resistor due to the higher amperage of the new main pump) for good idle and stock speed relay for the main pump with the pump rewire mod (also discussed years ago in the forum). The lift pump wire goes directly to the battery and again goes through the dual relay to turn on.
Mike