modify to strenghten a t-80 output--first drill out the air filter holes to double their size---smaller pulley on t-80 increases revs-reduce only 1 inch as past that you'll create too much heat. Install a brass t valve directly to the compressor and run 2 air reserve tanks. Adjust the overload blow off valve way down to produce more air and good to go with 2 divers to 10' UNLESS you have a panicy airhog gulper, than a righteous dual piston GAST ONLY is required. NO insane snorkel dorkel to suck up hot rising heat,oil and carbon dioxide vapors either. A simple directional flow adaptor to the engine exhaust sends it up and away(watch engine intake also as must be on opposite side) and KEEP that dredge away from brush and junk by the shore. Get a headache or weird taste in your mouth GET OUTTA THAT WATER ASAP. Found a floater once and crawdads and critters make a mess quick like-John