'80 D50 2.6L won't start

[BradMph]

If you go wider then a 235 60R 14 you may need to keep those truck bed fenders off the rubber because the wheel well can't take much more then that.
I went as far as I could go with a stock diameter and pretty sure they are 7in. rims I used on a lowered 2 inch block rear and cut coil front cassis.

These images sort of show the spacing. This was the direction I went though with higher profile tires so the speedometer stayed in check. You could go low profile with a taller rim to compensate the short profile. You want to try and maintain your correct MPH readings unless you know how to re-calibrate a speedometer.
Front

Back

[OCD Boss]

If you go wider then a 235 60R 14 you may need to keep those truck bed fenders off the rubber because the wheel well can't take much more then that.
I went as far as I could go with a stock diameter and pretty sure they are 7in. rims I used on a lowered 2 inch block rear and cut coil front cassis.

These images sort of show the spacing. This was the direction I went though with higher profile tires so the speedometer stayed in check. You could go low profile with a taller rim to compensate the short profile. You want to try and maintain your correct MPH readings unless you know how to re-calibrate a speedometer.
Front

Back

HEY, nice to see another Washington resident. Thank you for that info. I have been playing with ideas of sizes but wasn't 100% sure. I really like your truck. I checked out your other pictures of it too. I think I am gonna stick with pennyman1's lead with the 16 x 8 wrapped in the 205/55-16R rubber. I would certainly settle for 16 x 7 if I found the right wheel. But that's what I had in mind. And according to this tool ( http://www.discounttire.com/dtcs/infoTireMath.dos ) it wouldn't have TOO dramatic of an effect. In the worst case scenario, there is a local place that I know of that recalibrates for around $100 or so.

[OCD Boss]

Here we go!

http://www.summitracing.com/parts/usw-75-7760/overview/