Doug,
Nothing mounts there so trimming the back of the frame may be my best solution. Accuair also makes a similar tank but is suppose to be 29" wide. I may call and talk to them about getting EXACT dimensions. I'm kind of pissed the drawing on Ridetech's website is wrong. That would not fly in my line of work at all!
Josh at RT told me I'd probably not have to worry about draining, however it's got a port for a drain.
Yeah I'm in love with those shocks. Glad you like them since you basically paid for them