I'd run a 3:73 or 4:10 with an adjustable snubber for street/strip use, your choice.
Best guess is you have about 400hp, an 8"wide tire will hold if you've got the suspension dialed in.
Tire size would be what ever hooks best on the track and you can get under there.
I'd lose that stock convertor immediately and go with a 2200 to 2600 stall for
a decent all around street/strip package that can be driven daily without a bunch of headaches.
A trans cooler is a must.