I put an oil sensor on the block with the oil switch it says 4.15b (approx. 60.19psi) at cold. With that sound I do not let the engine warm up.

The engine has been rebuilt 3 years ago and ran a bit less than 6000miles. I ran into trouble after a little trip I comes that the engine block has cracked at the cylinder head bolts. So I went with 6 studs about 1 year ago and 185 miles before I have a camshaft stud who decide to unscrew. I didn't had this bad sound before. Just when the camshaft were bend. I bought a new one that is ok.
Since then I didn't really took the time to finish to repair it.
I downgraded my oil pump from a high pressure one to a original one.

The timing is perfect. I usualy have some trouble to get the camshaft perfectly aligned but I managed to do it this time.
I will try to check if there is enough oil spray in the head by the oil feed if by any bad chance there is a clogged oil line.