There is enough sheet metal at the bottom to bolt it to with 6mm bolts.
I ran the 4 gauge wire into the cab and down the bottom of the passenger doors.
I really wanted to go with a York but with no more bracket kits available I had to go with plan B.
Got the arb twin installed this weekend. Works better then what I expected. I'm not sure if I like the air coupler in side but we'll see how it goes.