5.7 0r 6.1 with msd hemi 6 and carb

Where are those charts from???? MSD???? Or stock timing charts--btw-When we ran my 70 duster with my 5.7 conversion we stopped adding timing at 39 degrees and we were still making hp gains took it up to 42 degrees and still making power but backed it off a few degrees,We read the plugs every pull on the dyno and no signs of detonation on the plugs or any knocking issues hence why I asked anyone else with this particular set-up,I don't need any speculation,I need someone with the same conversion --xv intake,Cam,Springs,650 quick fuel carb,TTI headers,Hemi-6 controller thanks Steve