1983 dodge d150 overcharged battery

I had the same issue with my w250 last year and i was going to do the relay fix but i couldn't bring myself to cut the harness up so this is how i fixed it . mine was charging 18v so i cleaned all connections and the bulkhead connector ran a few ground wires and got it down to 14.7v . Then i got the adjustable Transpo VR and set it to 13.8v its been over a year now and it's still charging a rock solid 13.8 .

HD EXTERNAL VOLTAGE REGULATOR CHRYSLER DODGE PLYMOUTH 1970-1987 Transpo C8313 | eBay