air bag help please!

[lownslow62]

whats up fellas, new to the bagged truck world. im in a snag.. the front end is pretty self explanitory to me, however, checkin out these other builds you guys got goin on.. look incredible fellas, my question is, the proper way to c notch the rear of my frame. i have the concept down, but i want everything to be perfect and done correctly, not just slapped together. its a 62 c-10 short bed. if you can shoot some tips for my rear frame work thatd be great! thanks guys.