Distributor curve help needed

I just checked the curve of my stock distributor (ported vacuum blocked) and need some help to optimize. Car is a 70 Duster with a stock 360, stock converter, 3.23 gears, 28" tires. Distributor currently has FBO black & gold springs with no limiter plate.

500-24*
1000-24*
1500-25*
2000-27*
2500-33*
3000-38*
3500-41*