Firecore Distributor Curve/Springs

Good morning everyone,

A quick question for those running the Firecore distributors. My 440 seems to like a lot of intial timing, I'm currently at 22 BTDC and think it wants a little more. I followed the instructions I found here to limit my mechanical advance.

I'm going to record when the mechanical start tonight and at what point I'm all in- I think its coming in too soon. I've been looking around and can't find any specific springs for it. Would the MSD springs work in the Firecore or are they different?