I have mostly finished me build. Stroked 5.4, GT heads w/ crower cams, R intake, 11.7 compression. I was getting the engine up to temp to take a log to finish my tune. When the engine got to temp it started squealing like a blet staring in cold weather and stalled dead from 1,200 RPM. It restarted just fine then did the same thing a couple minutes later. I have not started the engine since. Checked belt and pullies, pressure tested the cooling system, oil pressure shows good, but that is from the sensor. I have not pulled an oil plug from the back of a head to take a reading from up top. The cams spun good when assembling the engine. The only thing I can think of is an oiling problem and the cam journal comes to mind first. Any info or experience would be appreciated.