recently bought 50? 8n woriking on getting it to run, popped distrbutor cap off and no rotor!, PO says there was a rotor, my other 8n is front mount and point kit has a rotor, this is a side mount and shaft looks like it goes all way up to and into center of distributor cap, is this right? do some distrbutors not have rotors?. also after cap is snapped on the cap can still be turned 1/4 inch or more left or right with little effort. wont timing be affected? what have i got missing rotor or oddball distributor, manual says remove rotor on late model 8n to change points. appreciate the help