RE: 80+ MPH?! I don't think so...
whether it can or can't hit 166 mph, Radial TA's (or just about anything with the white letter/whitewall inlay in the sidewall) are about the last tire I'd run on any car capable of those speeds.
3.23 gears...you have the 727 or the 833 4 speed? I think both have a 1:1 top gear ratio...off the top of my head, 6600 rpm sounds reasonable, but that has to be one HELL of a 440 to be turning 6600 rpm. what heads are you runnin on that thing? I saw the sheetmetal intake (looks impressive)