Howdy... sounds like you are doing many of the bolt-on improvements. As you are probably aware, you are limited by an ECU, emissions, a plethra of various sensors, & modern fuel system, etc... with out converting the ignition system, fuel & internal components of your motor you seem to be doing all the available things. I would attack the sytem you have w/ a chip for sure, TB mods, intake, etc... on the 700R4, you might consider a stall & a corvette servo, combined with shift kit. Maybe just do all your bolt-ons w/ the motor & then attack your transmission more.