John and Hank,
You were both right about the cam.
it seems that there is one lobe that is going flat and is eating up the lifter in the proces.
the lifter ia already 4 mm shorter than the rest
i couldnt even get it out easy.
so i took of the front end and took out the cam
there are 3 lobes with some wear those lifters also have a diffrent wear pattern.
i always had enough oil pressure so that could not be the cause. It a new M4F cam ant new lifters that i bought from Patrick's about 1 1/2 year ago. I still want to figure out how a new cam can go flat after 200 miles.
I am going to order a new can and lifters tomorrow.

Dennis.