I'm about to restore the stratovent heater box for my 71 Charger and I'm hoping for clarification on the heater core. I managed to track down one or two posts that say to use the standard non-a/c core, but all the ones I find available online don't look right, at least in the available photos. The one in my heater box has a 1/2" and 5/8" port, while the aftermarket ones have two 5/8" ports. Likewise the pictures online seem to show much shorter inlet/outlet tubes (mine appear to be about 9" long), and the tubes in the pics don't appear to be routed correctly. Took a few pics of mine still installed in case it helps. Should have it pulled tomorrow and will post another pic of it then if needed.

Try this one
http://shop.advanceautoparts.com/p/carquest-or-toughone-heater-core-394152/5893240-P?navigationPath=L1*14922|L2*15021|L3*15934

Doesn't say it fits a 71 Charger but it looks just like it! I just got mine pulled and here's the pics, I'd say that's the one. I wonder what it cross references to?

I just did 71 Roadrunner , same heater core

Strange, I tried the same thing and came up with nothing. Everything matches up specification wise and the picture looks exactly the same so I went ahead and ordered it. Thanks!

I just changed the one in my 72 with Strato vent and used a Spectra core for non a/c. The fit was perfect.