carb tuning help

Ok, so i did some reading online and it seems that this dizzy actually has been causing the advance prob for alot of us mopar guys. MSD only offers the advance limiters in 25* 22* 21* and 18* so even if i ran the 18* limiter the most initial i could get would be 18*. i found a guy online that machines 10,12,14* degree limiter busings. if i were to go with the 14* bushing i could get 22* initial and 36* total. that should put me in the ball park. the dizzy came with a 21* bushing in it from the factory and the heavy advance springs. i am at
15* initial and 36* total right now.

do you think the change will help?