Anyone running 3.07 gears & 33" tires, with a 4L60?

[East Tex]

I'm building a '72 K5 with a 6.0 LQ9 and a 4L60. Tires are currently 32", but I plan on replacing them with 33"s after the project is complete. I pulled the diff covers off to find out the axle ratio, because Speartech needs to know the ratio in order to program my computer. Well I was surprised to find out that I had 3.07s. I figured that it had 3.73s but it didn't. This won't be a highway truck when its done, it may go to a local car show or take the grandkids to get an ice cream. So, my question is, has anyone on here ran 3.07s and 33"s with a LS? Does it lug bad when you're putting around town? I really don't want to invest in two new sets of gears, but I will if this isn't a good combination.
The front ring gear has some rust on the ring gear teeth, but I think it will clean up. See pics on my build thread.