Replaced the studs for the FM-150 and installed with a .25" spacer made by AFP. The spacers ae not stock items from them but they make them or any other spacer you need to order. Mine was ready to ship in 2 days. The spacer is needed to clear the linkage from the front of the air sump. ready to fit the snorkel now and the throttle and mixture cables. Replaced the studs for the left PMag. The Slick magneto that was removed has an impulse coupling and a 1" spacer so the studs are too long as the PMag does not need an impulse coupling or spacer. removing the studs and replacing them using the double nut method works well. Also removed the fuel flow transducer and reclocked the input fitting to provide more clearance from the exhaust pipe from cylinder 4.