I used to haul bulk hazmat for Ruan transport. Their trailers had big V twin compressors mounted between the landing legs and the trucks had to be equipped with a PTO shaft to the rear to turn the comp. Those compressors raised holy hell with the shafts. They had to be replaced about twice a year because recips hammer so much. Graingers has 1/4 and 1/3hp 12 volt compressors but they are $450. Would the compressors from the Cadillac and Park Avenue air leveling systems be any good? Probably too small! Craig