[dsraven]

stock under frame tanks like the blazer had a set of straps front to rear above the tank and these fit the tank contour well, then a set under the tank to bring the tank up tight against the upper straps like a sandwich. no movement an well supported. easy to drop the tank. there was some webbing type material used as an insulator to help stop metal on metal contact. if you plan to cut out cross members first x brace the frame so nothing moves dimensionally. do it so the bracing will be out of your way if possible or so you can fab and install a new cross member or 2 and then remove the bracing to install the tank etc. like mentioned above, the frame has cross members for a reason so if you take one ouit you gotta figure how the frame will react if you change the location of the new one. also, like mentioned, try to figure out how all the systems will fit together in the same space to make it all work out, tank, fuel lines, shocks, exhaust, park brake cables, wiring, box mount hardware etc. it sucks if you have to remove a bunch of stuff to access other stuff. after years of fixing things I can't tell you how many times I have wanted to be face to face with the engineers who decided it was a good idea to install stuff on the frame and then install the body on top. a lot of the fasteners point the wrong way or are simply not accessible with the body on. try not to do that if you can. stuff like hose clamps that you can see but not get a screwdriver on, things like that.