unfortunately I am not a cam guy so I dont have a specific recommendation but with 7.31 dynamic I sure think you could go milder for more bottom end. I'm not sure the 528 would be a good choice. What was the SCR? & what calculator did you use to get the DCR? You mentioned the .050 lift & reportedly the calculators such as the ones at Wallace racing use lift @ .005 which gives a more accurate DCR figure. Sorry no help but here's a BTT. EDIT just reread & saw the 3.23's & I'll emphatically say avoid the 528 (& I'm not a cam guy)