72 dart w/17" wheels. What problems?

72 dart swinger, came with 318/904/7.25 rear end. Front disc brakes, sbp.
Planning on using 17"-8 f 17"-9 rear. Bullit rims.
Stock width 8.75" rear end. LBP
3/4 (1/2") leaf relocation. Car lowered slightly in front, stock height rear.
Hoping to stuff 275/40/17 under the rear. 285s if I can make em fit without mini tub. Will mini tub of there's enough gain to make it worth it. Fabricating and welding not a problem.
Unsure about the front.
Converting front over to 5-4.5 bolt pattern
Sway bars front and rear.
Intended use is a street car, handling being primary focus but aggressively geared with 3.91 rear end. Trans will have a high stall.
Long term, planning on a GVOD so the 3.91 won't be as much of an issue cruising.

What are the problems and what are the solutions?

I expect to some cutting and hammering front and back.