Update after much Searching/evaluation:banghead: seems the tab is in the oil pan and it doesn't appear it would have made it into the valve spring or the valve/ cyinder head according a couple of folks here locally that know more than I do was told not to loose any sleep one guy even said he had...
My 2 cents $11 heater core hose just replaced mine yesterday if you got oil even slightly around distributor could be issue like you googled mine didn't leak but was really swolen and flimsy top radiator is right beside w/ therm too as mentioned above pulling distributor will be a must google...
So after changing both seal/o-ring in distributor and heater core hose I was reinstalling the distributor, after several attempts of lining up the back hole(rear bolt hole). I decided to use the bolts to help seat the ears back in place like a dumbass and then heard a click thought it was just...