8 3/4 gearing - 3.23 or 3.55?

My 255/60-15's are 27" so a 3.55 would be fine. About 3000@70. I don't usually drive that fast on the highway any way.
This is the same tire and wheel setup my dart is using. Speed on the highway really isn’t a priority and I’m going to be avoiding the highway as much as possible until I get the steering tightened up a good bit/rebuild the frontend. This will mostly be street cruiser to go into town and tear up some backroads lol