1979 2WD suspension and Tire questions.

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I know I have asked this before like a year ago, but with no Search I could look it back up. So I have to ask it again.

I own a 1979 C10 2WD which I am rebuilding. Anyways its a truck I can't sell and I really hate how low it is. I don't plan on going to places were 4x4 is a must, but would love to have it lifted. I have been searching for lift kit for the 2wd's and the biggest I found was a 2.5" lift. I am not looking for 22" of lift or anywhere near that but just alittle more ground clearance.

My questions are:
1. Is there any other lift kits out there that are more than 2.5" and body lift is out because I was told here to stay away from those. I want to know my options.
2. On a stock suspension C10 2WD what are the tallest and widest Tires you can run with a 15" Rim? My father said 31's would probably be the tallest I could run.

Thanks for any help.