Hi Clay, welcome to the 3A page. I can't say for sure on the values of your engines, too many unknowns at this point, but you may want to list them under the "for sale" section here and also on the G503 and the 2A pages and others. Value will depend in large part on the compression figures, oil consumption and leaks, among other things. Details about past rebuilds may also be useful if you have them. Good luck!