My first thought is……assuming the measurements are correct……it would be no surprise to me that a cam with 292* of advertised duration being installed 5* retarded from straight up(or 9* retarded from where I would have put it) is lacking some grunt.
My second thought is that’s a pretty big disparity in lift.
I’d suspect a lobe/lifter wear issue, and would want to verify the exhaust lift on a few other lobes.
It’s certainly possible it’s a custom that someone had done that way to facilitate it being used with the extra short IH & spring situation that goes along with the exhaust rotators being used.
The third thought is…….if it’s a low CR 360 in a truck……and again assuming the measurements are accurate……. There are better options for cams out there available for a combo like that.
Step one for me would be to put the cam in at 105-106.