Need help deciding 17 or 20 inch rims???

[69RustyBucket]

So after looking at countless forums I have narrowed it down to either 17 inch Vintage Wheel Works V40 wheels in gray with polished lips or 20 inch Torque thrust in gray with polished lips. My truck will be air bagged with spindles. Need help deciding??

[picklito]

I prefer the look of these trucks up to about 17", maybe 18". Larger than that, the look is just not right for me. These old trucks had a lot of sidewall. It was a period thing. Bringing that down a bit with the 17/18 looks really good to me, but leaves enough tire to show that we're driving a bygone era. Even on a mod or custom, I like to hint at that nostalgia.