Need advice for slowing my car down consistently.

I see you run pump gas and I,m wondering what the cost differences are with running 10.70 or 12.00 ?? Parts breakage?I would think to change to a 12.00,you might wanna change converters,gears.It would be pretty hard to run consistant unless you have some type of throttle adjustment to fine tune to a 12.01-02.Maybe the block under gas pedal will work?Good luck.

Do you run MSD with rev-limiter?Lower the RPM pill to rev...say 4500-5000??