parts for those mags and the mags are kinda high its cheeper if you look in the right places to upgrade to a dristributer i think all f163 and 162 come with the drive you just have to knock out the plug in the center of the head. had a mag come apart on an old p&h machine(it was preaty nasty)
at least down here in georgia cheepist i could find was 600$ think the hole kit new for a dis. isnt but 300. i found mine in an old forklift i had junked out with the same eng.