I wanna drag race----help

How large of tire will fit in this car without tubbing, with the 4:30 gear I will need tall.

NHRA Stocker guys run a 9 x 30 Hoosier tire without tubs or spring relocation. They also usually run a 4.30-4.88 gear so you should be good.

With the 340/360 stroker kits do I need forged crank and H beam rods for reliable 6800 RPM or will the cast crank with I beam be sufficient. I would like to run 10.5:1 comp.

There's guys on this site running low 11s with a cast crank.

With cost versus performance in mind will I save any money reworking a set of factory heads or am I just better off with a set of Edelbrock alum heads.

Edelbrock heads have to be the best bang for the buck. If the literature is to be believed, they flow better than stock heads and are lighter too. Plus they're new castings.

I,d like to run in the mid to low 12's and still cruise on weekends.Will I need a special driveshaft. FYI it already has yukon axles.

Probably not though an aluminum or carbon fiber one would save weight. Obviously just make sure to balance it and get the pinion angle correct. A billet differential yoke is also a good idea.