since your nacelles are not sheeted, find a home for your CDI unit if your going that way. If your doing G38's (which are more than plenty of power) line the cut outs with roofing tin or some type of sheetmetal and use the stock exhaust. Not so much for the heat but for the velocity of exhaust gas coming out. It will rip the paint off. BTW, jam the air bottle and up/down valve between the tanks in the center section. Never have to disconnect the air lines.