8 3/4 gears

4.56 gears, which I run on a 90+% street car are great......if you have an OD. If you don't it is an around the city deal only, 4,400 at freeway speeds would be maddening and not good for the engine either.

The highway would actually make a big cam happy, especially assuming it's turning some R's. My car runs around 2,600@60 but if I wheel it 75+ down the interstate it loves it and is in the 3300RPM range. Smooth and happy. I've had modern car spin that at interstate speeds.
I think even like lead was saying it's up to the individual what streetable means to their comfort zone... Also the correct combination is undeniable as well but is also suited to one's purpose and comfort..
For me I've tried a couple few different combinations maybe four that I can think of and my comfort zone is liking the 355 gears and that's with 29 inch tall nitto 555's . 11.2 to 1 dual quad tunnel ram 4 speed.. like yours it seems to buzz down the freeway anywhere between 26 and 3K RPM... It hasn't any problem with that and stays almost too cool... With 22,000 BTUs of AC both in and out LOL...
One of these days when I feel the want I'm going to have to hit that hundred shot...:D...