Clydes Custom Repair

We took our older pick up to Clyde's two times because the engine kept over heating and had stalled on the freeway. The first time he worked on it but the problem was not solved. It overheated the next time we drove it. The second time he tried something else but still the problem is not corrected. Now we are $1,000 into it and he says it may have a blown head gasket which will be another $1500 +! But he STILL isn't sure what is wrong with it!! We will NOT be going back to Clyde's Automotive. He does NOT stand behind his work and may not even know what he is doing!