I bought the Surefly for my 0-360-A1A from spruce with the required ACS ignition harness as my mags are Bendix, and the surefire requires slick magneto wires...
I never took it out of the box as my mechanic pretty much insisted that I just go with the old Bendix magneto’s.
I’m not a mechanic but I’ve heard the arguments both directions on staying with the old school or switching to Surefly.
I read the installation directions and with this magneto you can have variable timing or you can set the timing to where you need to be via dip switches.
maybe in 500 hrs I’ll go with the surefly... Maybe sooner