I bought my 74 GT380 new and have not driven it for 40 years. Trying to get it running again and I'm having spark issues. Everything looks brand new but because of not having spark I replaced the points and condensers. Now I only have spark on one cylinder. The battery is new and gauges at 12.8 volts but when I check the voltage at the points all the points gauge at 10.7 volts. Any help as to why the voltage is deceased at the points? Any suggestions where to go from here?