spark plug gap

[farmingafuture]

Hi all, first post, it looks like I'm buying a 1994 Ranger today, we'll see how it checks out. I'm also rebuilding a 1992, both have the 4.0.

In the end, from this thread, it looks like anywhere in the .052-.068 range should work fine as far as the spacing goes?

I live on a mountain, 4wd Low range and first gear only for about 3 miles, am at 3300ft, and on my town runs the max speed I'll drive is 55, but typically 35-45, and at sea level-ish.

Are there any suggestions for how I can make the best adjustments based on this info?

In the Jeep Grand Cherokee that I am currently driving (thing is a lemon, but it's powerful), which is a Inline 6, I really don't have to push over 1500rpm in first gear @ 4wd low, so I'm not anticipating needing any more than that with the Ford 4.0...I could be wrong, another "we'll see" moment.

Getting up my trail isn't a fast process, or high rpm, it's a very slow and steady "oh god, please don't flip off this cliff/down this hill" crawling pace...same for getting down.

Any insight and experience may be helpful.

Thanks!