Narrowed down wheel/tire combos - Looking for opinions/advice and pics

[70StepsideC10]

I've been lurking the forum gathering all sorts of useful info since I bought my truck 3 years ago but this is my first thread. I'm currently in the dreaded process of deciding on a wheel and tire combo for my 1970 C10 stepside. The truck is at stock height right now but I bought an ECE 3.5"/5" lowering kit that I will be installing when the truck comes out of winter storage. I also got an adjustable panhard bar to centre the rear. I believe I have the wider rear end, I haven't actually taken the wheels off to measure yet but I talked to the guys at ECE and they said based on some measurements I took of the housing it seems to be the wider rear end. I currently have 15" Cragar SS wheels on the truck with 255/70/15 tires. I don't mind the Cragars, but I think I am going to have issues with them rubbing on the lower control arm when I lower the truck based on the backspace of the wheels (I think it is 4.25" but have to measure to verify) and what I have read on this site. I would rather not grind the LCA to alleviate the rubbing. I have looked at a lot of pictures on here of different wheel/tire combos, unfortunately some of the ones I like most they don't make those matching tire sizes anymore. So I have narrowed down the selections, and would like some opinions/advice as well as some photos of these same combos if you have them. I am most likely going with TTII's as I like the look and price point. With these options, I'm not sure how a 275 would look on an 8" rim. According to the tire specs it would work, but there might be a lot of bulge. And a 235 on the front might look skinnier than I would like, so again photos would be helpful if you are running them.

Option 1
17x8 front, 4" backspace, 255/50/17
17x9.5 rear, 5.5" backspace, 275/50/17
**might be too much backspace on the rear based on what I have read, I will have to measure my truck to confirm**

Option 2
17x8 front, 4" backspace, 255/50/17
17x8 rear, 4" backspace, 275/50/17

Option 3
17x8 front, 4" backspace, 235/60/17
17x9.5 rear, 5.5" backspace, 275/55/17
**might be too much backspace on the rear based on what I have read, I will have to measure my truck to confirm**

Option 4
17x8 front, 4" backspace, 235/60/17
17x8 rear, 4" backspace, 275/55/17

Option 5
18x8 front, 4.5" backspace, 235/55/18
18x9 rear, 5" backspace, 255/55/18

Option 6
18x8 front, 4.5" backspace, 255/50/18
18x8 rear, 4.5" backspace, 255/55/18
**I could go with 18x9 on the rear here too, but figured it would look funny having less tire bulge on the rear if I'm going with a 255 on the front as well**


Thanks in advance, any info is much appreciated!