Need everyone's oppinion

I'm building up a 8.75 489 with 3.55:1 gears for the Demon street car. It has a mild 4bbl 318 in it. Have a pal who ran a small pinion 8.75 with 3.91s and slicks behind a 440+6 in a 70 Cuda. Car ran under 11:00 once we got it to hook up. No problem with the rear.

If it were a Hemi or mountain motor drag car, then the Dana make sense. Otherwise, I recommend the 8.75.