The shroud should work if you modify the holes on either the shroud or the aluminum rails of the radiator (at least on the 26" one on my Challenger). You will have to get some of those sheet metal screw inserts clips or use your old ones though. Mine isn't on yet, but I got it really close one day and quit after about the third time since the car didn't overheat without the shroud I left it off. The fan clutch went out this summer and the replacement doesn't cool in traffic well, so I am going to put it on over the winter - with a few mods it should work.

I also had to do some grinding to get the radiator to the right spot. No big deal though. Cheaper than a recore of the stock unit.