1991 Chevy Silverado Lift the suspension

My truck has a 3" body lift and i had 33"/12.50/15.0 tires on it, and the tires did not rub on my fenders when i turn, But now i just bought 35"/12.50/15 to put on it. So now my question is, will the new 35" tires rub on the fenders?, and if so, how can i lift up the suspension just a bit so it doesn't rub the fenders when i turn without having to buy a suspension lift?. Someone told me to thighten up the torsion bars to the maximum, but will that affect the alignment?. I just don't want to eat the tires to fast since they are expensive. Thank you.