Ordered new wheels now trying to get an idea of tire size

[808_67C10]

I have a 85 c10 - up front (springs/drop spindle) and a flip kit in the rear (no c notch)

I ordered US Mags 20x8 for the front and 20x9.5 for the rear.

I looked through tons of threads and am having a hard time coming up with the right tire. I want a little more beef in the rear but not too much to make it look akward.

Anyone have any thoughts? I dont want to take out or modify my front fenders either - just want to do it right the first time.

Currently I have 275/50-15 rear and 225/60-15 front (the fronts are a bit too small)