'60 Impala wheel & tire suggestions - finally getting close.

[oz07]

It's been along time at the paint/body guy, interior is scheduled and I'm getting close to needding to make my mind up. It's stock suspension with the exception of 2" drop spindles in the front. I want to do the widest tire I could do in the back in an 18" or 20" and I want to keep a good amount of sidewall all the way around. The front I'm not sold if I should stagger or run the same wheel diameter in the front. I don't want any chance of rubbing. My budget is somewhat limited but would like input or experience. Pics would be even better - Thanks all!