Distributor advance

Got a brand new rpm air gap and Holley 650. When I got it, it was set up for the strip. Mopar m1 Holley 750. 410 gear. I wanted to bring it down a bit and don't have much experience. So I think that not only do I have to limit the advance by slot adjustment, but I think I need tighter springs as well. Advances all the way by 1500 rpm?