A new look???

Ok guys, I have a couple ideas and like everyone else...... On a budget. Ok here it goes. Gretchen is kinda low already, and my intent was to put it on the ground. Never can seem to come up with enough cash to do it so, I am currently running 145/65/15's on the front so it could be lowered more. And 175/65/15's in the rear. I guess the look I'm going for (cost effective) is putting some 175/65's on the front giving me four of the same size tires and then raising the rear one notch still giving me the level or slight rake look. I would like to trade the really good 145's for some same quality 175's. y'all think that's possible or try to sell them to just buy new 175's?

kinda hard to see but there's a tad to much room between the tire and fender.