[wakesupremo]

i drove my '69 'bird for the first time since the 469 was fitted. I drove it home from the engine builders workshop. The engine had been run and had been on a dyno where it proved to have 540 hp and 600ft lb of torque and no issues. It was on the dyno for 4 hours. The engine was then fitted into the car by myself and the engine builder with no issues. we then fitted an oil filter relocation kit and moved the filter to the front core support. The engine has been 'run up' in the car with no obvious issues to have the fluids etc checked.
The journey home proved otherwise, once the engine was warm, then got warmer and eventually very hot (200 plus) the oil pressure went to nearly nothing unless I kept it above 2000 revs. It rose as soon as I revved it. Once home I immediately switched off and looked for the obvious.
The oil filter is absolutely stone cold ?????What would be the first to look at? Thank you in advance.