Wheel/Tire question

[novanutcase]

I plan on running BFG KDW2's on my'66 Chevy 2 Nova project. Front will have 18/40 and rear will run 18/35. My question is if I run an 8" wheel in front and a 10" wheel in back what size/width tire should I run? I was thinking about 245's for the front and 295's for the back. I will be minitubbing the rear and putting a new front clip for the front, probably an Alston, Morrison or Wayne Due. I would like to get the sidewall to run parallel with the rim and not bulge out. Oh....I will be putting them on these:





How wide can I go in front without having rubbing issues when I try and make a u-turn?