2:91 or 3:55?

AJ/FormS, I just want to jump in here a second, cause I have a very similar setup to TrailBeast. Or at least I will soon. My '68 Dart has a carburated 5.9mag, stock bottom end, right now stock cam, edelbrock air gap and a 1406 carb. Dougs headers.

This weekend I'll be pulling my engine and tranny to do both an A500 swap, and a cam swap to a Lunati voodoo [email protected]
My car currently has 3:23's but I have a brand new set of 3:55's I was going to throw in soon as well. Just haven't done the gears yet cause I'm saving up for suregrip to throw in there too.

I think I might be running a smaller rear tire, most guys here seem to be running a 27-28 inch tire. My 225/60-15's are 25.5"

In my case, would you recommend just leaving the 3:23's in there till I get the cam and tranny swap done and see how it feels? Or go ahead and throw in the 3:55's at the same time?

Note: I do a lot more highway driving than in town.