I recently pruchased a solid 1970 Ford 4400. it was running a little rough and seemd to have some timing issues so I dropped in a new distributor. Tractor ran great for about 3 hours. Then it backfired and quit. The distributor no longer engages the gears on the governor shaft so I assume the distributor ground the shaft gears down. My new dizzy has a very shiny gear on it while my old dizzy has a dull, cast looking gear. Does the new dizzy have the wrong gear on it, maybe too hard? or is this just a case of new parts breaking old parts The governor shaft is over 300 bucks so i cant afford for this to happen again. Should I sawp the gear off the old dizzy onto the new one? Is there something else am missing?