you could have hardened valve seats put in for unleaded. I don’t think it’s a big deal. I have ran lots of old stuff on unleaded and nothing has died yet. If you don’t drive it a lot you should be fine. Put some lead substitute additive in every other tank or so if it makes you feel better.
car stealing 101
Jumper from battery to positive side of coil. (hook up last)
Remote starter (jumper with pushbutton switch) from battery side large lug on solenoid to positive small lug (has rubber boot on it).
Once you power the coil do your cranking. If it doesn’t run unhook right away or you will burn the points. If you are just cranking with no intention of starting (like lubing the cylinders) don’t hook up the coil.