With your weight and having that much arm. I'd run 17/46 or 17/47 gearing. That will put you across the line top of 5th.
Everybody has their preference for gearing and if they want to cross top of 4th, 5th, 6th etc...
My preference is to be crossing the line at the top of whatever gear I happen to be in. So,either gear "higher" and finish top of 4th; or gear "lower" and wind out 5th. Use all of whatever gear (4/5/6) you shift to.
I would not want to be using all of 6th though. But I'm not a "Heavy Hitter" either.
I'm 220 out of the shower.
My buddy is 230lb geared up and at 64" wb, stock motor 2nd gen with: Exhaust, Filter, Clutch Mod, Tune, Racing Shock, Air Shifter, Strapped, Dogbones, 17/46 and a lot of seat time-runs consistent 8.90s
He's running my old setup, best I did was 9.08. He just has the technique.