Your favorite rear end/final drive ratio and why?

I've got a 9.25 in my '71 Duster with 3.55 gears, 28" tall tires, 833 stick. I run 60@2600. Engine is a 414 small block. Didn't want a gear that I'd be pulling second as soon as I put my foot in it. Plan to install the Tremec TKX soon but the 3.55 will stay. Then, I'll run 70@2400. I got the .81 OD.