Speed/Tire/RPM calculator
You might want to go play with this calculator to make sure you are staying in your power band. I have a 225 slant with the OD trans in my truck with 3.55 gears and 29" tires. On the freeway, it's barely into the power band turning 2000 RPM at 65. I'm changing to 3.91's to get cruising speed up to 2300 or so.
Just for grins I ran your numbers, with a 27" tire and 2.7x gears, at 65 you'd only be turning 1600 RPM. That may make you happy, or it may not. I found I could barely operate at such a low RPM.
