4.30's are very streetable depending on tire height. I ran them for years with 29" tall tires, very easy to drive even on 40mile trips. I have a tunnel ram on my Hemi right now, and its far better than any cross ram or 4bbl intake I have run, but it is efi.

I have a number SB TR's as well, currently waiting to be used on my latest ride by the way, it has a 3500 stall and 4.56 gears and I drive it every sunny day I get and sometimes as far as 50-60 miles 1-way. Very streetable, and you don't even notice the converter unless you really hammer it. Then it just breaks the 15x29's loose anyways and I have to do some serious steering correction. I do have to mention that I have an A-500 with OD that helps with the gears though.

I have also run a tight 8" 4700 stall on the street with no issues as well, but it was a light car ('72 Cuda).