Ok I have to ask again due to my cams being off and the chance to change um.

My 92' N/T cams have a small F stamped on the intake cam close to the belt sproket and a D on the exhaust cam. I am ignoring theprotruding huge A and J on both N/T cams because I don't no what there for.

I have another 91' turbo and there are no marks accept an RA on the intake cam near the CAS slots and on the exhaust cam an R9 in the same location, the turbo cams also look like they are better quality have less slag and unnessary material.

Is there any diff between these cams concerning duration or lobe height?..
thanks.
the stock cam info seemed vauge to me