A-Body 8.25 or 8.75 Rearend Needed..

I hear the "Go-Go" Darts are the odd ball cars. I didn't hear about them till now. In fact I can't find any info. I got the car thinking it was a "CHARGER" Dart. I got a 03/1965 Dart GT from the LA plant. When I checked the vin it came up as Go-Go/ Charger in 1965. 180 chargers produced 37 exist in the registry.. I was clueless.. It has the 235 HP 273 4-barrel, 727 auto, buckets, . The black top and yellow paint but its not a charger. 14x5 wheels, did dish hub caps, and full GT trim. It's an A/C delete car as well, no A/C switch on the dash and a dealer A/C box came with the deal but no brackets or holes in the firewall.