Small block MP .528 solid cam - which valve springs?

I ran one a bagillion years ago in a 73 340 Charger. Car went 13.40s with 3.91s. It was a pig but it was fast for a stock bodied street car. I drove to the track, swapped out my slicks in the trunk, swapped back when done, clicked the A/C on and drove home. Did that for two years. Had a lot of fun in that car.