Hello, I have a mystery cam we think is a General Kinetics 590 for a 426 Hemi. It is a solid flat tappet. Only identifying features are a '590' at 12 o'clock & 'GK' at 4 o'clock on the cam face. Intake lobes are .367"~ & exhaust lobes are .370"~. Do you recognize this cam and, if so, what is the duration at .020" and/or .050", centerline & LSA? I appreciate any assistance. Thank you.