A833 4-Speed on a 4-500hp 440: 18 or 23 Spline Necessary?

My bad, I was judging from my prospective witch is tubs are not "street car".
Well, to be fair, I wouldn't have tubbed it out myself. I would have put some wider wheels with appropriate backspacing on for some "wider" tires. But these suckers look good....and I don't think traction will be a problem...turning maybe, but not traction! lol