what DOT drag radial to use

You should be fine with that tire. Only advice is if there going on a 6" wheel, you'll really need to experiment with pressures to get a good contact patch. Probably will end up on the low side, just be careful not to get too low as it'll cause you to be a little squirrelly on the top end.

They are 7 inch wheels . think they are the ford mag wheels i know mopar didnt make one that wide