suspension compatability

[1ST BUILD]

let me say first what a great find this site is !!! A wealth of talented craftsmen shareing their time & trade knowledge , gold !!!
Im starting a build on a 70 stepside , just got the frame back . combo will be a 502 , 400 w/ gear vendors , 9" rear , and big meats ( a step side needs big tires ! ) Question is , are air bags compatable with this set up . will a drop member and notched 4 link rear hold up ? Can you lay frame and still take it to the track ? or are these 2 different worlds . Thanks for any help and guidance, this is my first build .