WS6 Canada

I blew up my rear end (stock) this week end at the track and realized that i have the wrong tires and rims.....I have the stock 17" rims and M/T ET streets, I CANNOT HOOK UP!!!!!!!!!!!!!!!

Now that my rear end is shot, I am going to buy a Moser 9".
My question is.....I am looking at the Weld Prostar 15" rims (i realize that i have to shave my rotors)
What tire size will fit with out beating the fenders in???? I would prefere a Drag/street tire, and then what gear ratio would be best M6 trans...

I have done all the searches and am totaly messed up with all the options.
From what i see I should get the weld Po star 15x10 wheels (what offset)
and 28x10.5x15 ET streets, but i think i have to beat the fenders with that size, would the 27x10.5x15 M/T ET streets be my choice???

Also the gear sizes range from 4.10 to 3.73????

Please help this is a big dollar change over and i what to do it right...I need a good starting point!!!