J Deere 318 Starting to use oil

Hello - I am new to the forum. I have a 1987 John Deere 318 that is using a bit of oil. I would like to find a capable mechanic in my area "Charleston, SC" who could rebuild my engine. The J. Deere Dealer "Sparrow & Kennedy" doesn't want to work on the 318 so I am hopeful of finding a mechanic. If you can help me with a recommendation please let me know. Thanks