air bags

[79 blue monster]

This summer i either want to bag my truck or just cut coils and reduce my leaf packs. Id like to bag it but dont know what is a good company, yet not too expensive. Any good companies out their? also pros/cons of bagging vs cutting? for bagging, i know you have to c notch the frame but do i just do the little "in-frame" c-notches, or do i have to cut the frame and build the big "c" in it. Do i have to have to make arms from under the cab back to the axle?(i have leafs right now). i'm new to this bagging thing and dont really know much. please help!