Looking in your sig that is slow for your combo you mph should be higher. We have similar setups but my long block is unopened and i run 12.20 @ 110 all day (car can go faster) not locking the convertor and thats 23 psi and a 1.7 60 wit MTDR's.
Get your current combo faster and save the funds.
You should be in the 1teens on MPH easily with that setup.
HMO hate for you to spend more dough when not needed