Does anybody repro the core support for a 69 Dart

67-72 core supports are different than 73-76 if he is restoring. The difference is the location of the radiator mounting nutplates.

I bought a 22" aluminum radiator for 73-76 A body because of the inlet, outlet locations were where i needed them. None of the radiator mount holes lined up to my 67 core support. No problem, i made my own radiator flanges from .125 aluminum sheet, and modified my new aluminum radiator it to fit my core support..

I wouldn't assume anything based on whether or not an aftermarket radiator lined up with the stock mounts.

The radiator mounting locations on my '71 Dart and my '74 Duster are in the exact same location, both are for 22" radiators.

That's not to say there are no other differences if you're worried about minor stamping variations or mounting hole locations, there are minor changes if you consider the whole range. But unless it's a 100% accurate restoration you'd be able to use any 67-76 core that had a 22" radiator. If it's a 100% accurate restoration you'd probably need one from 67-69, and maybe not even all of those years.