a good converter will make a huge difference. i think i would drop to a 26" tire too.. my dart would go 1.63 sixty foot times with a 3.91 gear and 26" tire. the 284 mp cam will want at least 3000 stall and at minimum 3.91 gear.
personally what i would do is call a good converter company dynamic,ultimate ot ptc and get them to build one to your combo and intended use.
i had dynamic do one for my dart. it was a 9.5" that flashed to 3800 rpm but was totally streetable. actually felt like a stock converter on the street. could easily sit at the starting line and get 3000rpm out of it just on the foot brake