Mounting a new light bar on my 1969 f100

[Fenster113]

I need some help on how to mount this light bar on my truck, I have a roof rack from a tocoma that I want to chop up and use and I want to put the lights on the front of it but I don’t have a cage so I can’t just mount it straight to the cab, so I’m wanting to come off my bed cage and mount it that way, but would my lights be too far out and heavy for what I’m trying to achieve? Truck for reference