I have 3,23 gears in my mopars. 3.25 should be good
I'm with Chaz, that is what I have in my Barracuda and it seems just about right. Any lower and it winds too fast on the freeway, any higher ratio and it may be a bit of a slug. I have wanted to try maybe some 3.55 gears but the trade-off is not worth the money since I have a good set of 3.23's in it now!