BLanham
+1y
use a jig, and you dont need to know how much to cut off, when i say jig i mean a piece of square tubing that is cut 4" long and 3" wide and 3" high. This piece of tubing will represent any bag fully deflated, just screw 2 holes into the top like a normal bag has and 1 at the bottom of the square tubing. Make sure the holes are spaced apart to the exact holes on the bags or the studs on the bags. After you drill the holes you need to place the square tubing on the lower arm where you want your bag to be sitting, jack the control arm up and wherever it stops is where you need to weld the upper bracket, the bracket will need to be cut to line back up with the holes on the squaure tubing but its necessary to do this so your bag will deflate all the way, and it saves a lot of time and will alaways have the square piece for any future bags installs, hope this helps