I've been working on the 38 UTS-serial #300 that I salvaged two years ago. I have rebuilt the engine and am close to finishing it but my radiator shop said I should get a new core for $800.00 It looked really good when I took it in I thought but he says it's brittle. Does that sound right or is he trying to double his money on a job. Does anyone out there have a better choice since I am getting a lot into this job already as I had to find and bore a new block and then the head because it was cracked badly & carburetor rebuilt. A radiator and exhaust manifold and some 32" rims and it might be almost ready to run again so if anyone has any of these let me know what you have.