72 wheel and tire size help.....

[sledge_hammer]

I am looking for help picking the correct wheel and tire size. I have a 72 s/s s/b, C-10. It has 2 1/2 spindles, one rear leaf removed. Former 250 3 spd, now 396 T400.

I would like to use over sized wheels and tires. What is the largest tires that will fit in both the front and rear fender wells without modifying. If you are giving me wheel size, please give back spacing and off set. I would prefer to have the same size front and rear: or the other option is for a pro stock look, but I am sure I have to tub the rear for this to happen.

Part two, where is the cheapest place to buy the rims and tires. I live in southern BC and have an address for US shipping.

thanks

sledge