767 Jockey You need the voltage regulator to match the output on the ALT. There are heavyduty and regulator ones. Look for a 60 amp atl and go with that regulator. Try F-250 trucks for Ford squire wagons. You might want to look at a 1 wire Alt setup. It svaes alot of problems. I do have my regulator mounted on the flat side of the L/s fender. This is where ERA mount thiers. ERA mount there Alt on the r/s of the motor, mine is on the L/s because of the P/S setup I run. If you are running alot of electricial things, a 60 amp is boarder line for keeping the battery charged at Idle for a long time. Add up the total amps used with everything on, Fans, blower motor, lights, MSD ignition( this is a big drainer)Fuel pump if electric. You may want to look at the MAD setup. Try looking at old threads on charging systems. A couple of the guys are running 100 or 140 Alts. I have an old Autocraft 100amp Alt and the thing weights about 12 pounds and is huge. Rick L. Would they let you borrow a generator off your plane Doug?