I reworked the numbers for our 4th gear (over drive) and got this:
Stock Tire/Stock Diff = 60mph @ 2117rpm and 70mph @ 2470rpm
33" Tire/Stock Diff = 60mph @ 1899rpm and 70mph @ 2216rpm
35" Tire/5.38 Diff = 60mph @ 2241 and 70mph @ 2614rpm
That doesn't sound right but according to the formulas and numbers it should be, oh well, I think the 5.38s with 35"s would work.