No. The customer ended up trading in the truck and now it is my problem. We did find that once the engine was running, that in order to keep it running, the distributor would need to be turned significantly- which changes the timing. Once the engine was shut off it would not start again unless the timing was changed again.
We pulled the engine, front cover, timing gears and chain. The thought was that a keyway was worn on either the camshaft or the crankshaft causing the timing to continually change. They ended up being like new. We pulled the distribotor and checked the gear which was good as well.
So it is on the back burner for now but I would sure like to get it fixed without pouring much more money into it. It would be nice to know that we have cured the problem before we reinstall the engine.