Oh, NO! Not Wheels Again! Here it is With Rallys.

[magwakeenercew2jh]

I've read, and read, and read. I've had some great advice. Now, I'm (almost) ready to pull the trigger on some wheels.
This is a big deal for me, because I'm not rich. So, I'd really like to get it right the first time.

I have a line on some Boss 338 18's. I know about the machining issue and don't know about the series or whether the mfg.
has fixed the problem or not. With the price differential, I'm willing to grind the front down to fit the wheels.

But, I'd really like to know...and even get pics if you would send them...on this set up.

338 Wheel Finish gray with chrome lip
Size 18 x 9.5Boss Wheel Model
4.5 backspace (in front) , 5.0 backspace (rear)

Model '71 C-10 Short Fleet w/4/6 drop (spindles and coils up front drums/coils in rear.

Tires recommended are 255 55/18's.

I've looked and asked, and read, etc. But I really want to order some wheels now. So I need some expert opinions.
My '72 had 15 x 10's and I don't ebven know the backspacing or tire size. It had a little less drop in the rear, and the wheels looked good on her.

But this new '68 (cab) '71 (everything else) rat is the keeper. RIP '72.
Since I can't afford the paint now, I'd like to do the wheels and tires.

Anybody have input on the wheel or tire size with my set-up?

Here are Rally's that are on her now.

Thanks a lot.