2x gsxr engines

I’ve 2 gsxr 600 engines for sale First engine was rebuilt by wogan performance but a noise came in the engine after about 15 minutes , suspected cam chain tensioner had a new gearbox fitted too . 2nd engine came out of a road bike before sale , Has damage due to the chain coming off,I had a patch put over it and never a problem for more than a year , but had the engine swapped before sale of bike . Year 2009 Semog casmat sx01 buggy auto cross