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Ok so a radical cam should normally be 15-18 btdc

There is no cam timing marks on the timing cover, the cam moves at half the speed that the crankshaft does, so does the distributor The marks on the timing tab on the timing cover are for ignition timing To check the valve timing on the camshaft you need a degree wheel and a accurate Top Dead Center indictaor Make sure and check the second lobe back on the # 1 cylinder, that is the intake lobe, the front one is the exahust lobe Everybody out there that has degreed a cam or two has probally forgot which lobe to use to check tha cam timing at least once, including me
As far as ignition timing I like to set the distributors up so they have between 8 to 10 distribuor degrees advance built in, 16 to 20 crankshaft degrees, so the total timing with the motor revved up so all the mechanical advance is kick in all the way, that the motor has between 34 and 36 degrres bTDC IHTHs

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)