I don't see how the engine could run well and then not due to cam issue. If it sat for 2 years it could well have carb or fuel issues. You can degree using your hydraulic lifters at least with pushrod removed so lifter doesn’t compress. After finding TDC you should be finding max lift point on the intake lobe and rotating 0.050 cw and ccw from max lift. Add the 2 numbers and divide my 2. Just in my google degreeing using the intake centreline method to find the YouTube video. I followed this procedure last week with repeatable results.
