Getting ready to buy the Borgeson box

I just installed My QA1 K member and lower control arms and I am getting ready to pull the trigger on a Borgeson steering box and wondered what advice I can get from you guys on where to buy, what all I will need to complete the install and any other observations. Going into a 1970 Dart 340 Swinger with a 408 and 4 speed. I plan on driving it a lot and thought I would like to have at least one car that don't drive like a boat. I've owned so many Mopars that I kind of have that steering drift programmed into my brain, when I drive my Corvette I drift all over the road.(before you start hating on the vette, it was a $2000 yard sale purchase so its cheap and fun to drive)