Amp guage maxed out.

Vin. LH23D9B16710
Dart Custom
2 DR HT
273
1969
Hamtramck MI.
Last six digits are the production numbers

When I got the car eighteen years ago it had a 318 in it with electronic ignition witch worked fine. Found a 340 for it ten years ago and finally had it done bought all new electronic ignition. Wiring harness shorted out at the shop and was.......fixed. I was talking to a wiring guy on the phone today where I could explain things much better I'm not a very good reader answerer ...much better on the phone and from what we discussed the best thing I can come up with is take the car in and get a new painless wiring kit put in because of what happened and also because of how old the original is.