Nick. the aiplane engines aren't subjected to the type of abuse buggy and truck engines are, in my experiences I find most pilots know how to tune an engine and if they aren't sure they err on the rich side. not like car guys (lean for max power and run it till she blows), you should be good with a used engine. just take the time to look it over and make sure eveything look good. find out what the factory settings are and start from scratch.

The plane looks great hope you have a great time with it.