2.76 vs 3.23 vs 3.55

I've got 3.23 with 245 60r15's and a 904 with low gear planeary with stock converter for now. 2600 at 65 mph and get beween 16-17 mpg in my 318. Not bad off the line but won't win any street races. Not obscene on the highway either. For a non overdrive it's not a bad compromise.