Try Reliable Automotive in Franklin. John and the guys there are awesome, and they've done a ton of work on my 4 cyl gas (4G64) L400. I just returned from a 3000+ mile road trip out west with no issues at all. Not sure how they are with diesels, but I couldn't recommend them more. They did cam seals, radiator, timing belt/water pump, rear main seal, and complete ac replacement. I had to source some of the harder to find parts, but they do excellent work.
Could you please add them to the map? Thanks!Justin at Weld-Rite in Mount Pleasant. They only do diesel engines. Currently have my L300 in for a head gasket.