Well, I hate to sell the Duster but I found a deal I couldn't refuse. Here she is:
Not a slant, but Mopar through and through.
1971 Dodge Charger SE, 383 2bbl, 727 Torquflite, 8 3/4 2.93:1 Open Diff
Numbers match and damn near everything works. Oh well, my Duster was my first slant six but she won't be my last. She's up for sale in the cars for sale section if anyone is interested.