I want to chop the top of a 1980 Chevy c10 about 4 inches...never done it before and need some tips..I dont really understand the whole concept of it..if someone could help me out man thatd be real cool..also, Im putting a complete air ride suspension kit on the truck and need some tips on that as well...I dont want to take the body off of the frame of the truck to do it and im almost positive I could manage without doing that but someone told me id have to...any tips??