Hi Mike that is excellent info and answered my question thank you!
That's what I needed to know-
I will have the boys dig the old ones out, if they can, or rent digger....(what about just cutting them down to ground level?)
I will get the new right posts, and space them 6' apart or as close to 6' as I can to change the location from where the current posts are, and buy 6' long panels, current ones are 8' apart. If I run into a rock or problem- I can cut the fence panel. I was really hoping there was a way I could just slap the new panels on the old short posts and make this a quick project but I also don't want the fence falling over

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Thanks for the tip on calling utility co- I'll call electric, water, and gas.
This forum is fantastic. Thank you.