Right hand thread/left hand thread 68 charger????, pressed on drums?????help!!!!!!

The LH/RH studs were a problem dating back to when these cars were new ! My parents had a '69 Dart Custom (1971-1985) ; and every time my dad took the car in for service , he'd either forget to tell the "service adviser" about the wheel studs or the shop's mechanic* would forget . Next thing you know it was , "Mister Hughes , our mechanic ... "
1970 was the last model year for that dreaded RH / LH deal . Most have been converted , at least in my experiences .
As previously stated , check for an "L" or an "R" stamped on the end of the wheel studs .

*= In the old days , guys who turned wrenches were called "mechanic" , not "technician" like they're called these days .