You could very easily disable the pressure the turbos produce and I have done it plenty of times when things have gone wrong, not with me Z but the plan is the same.
Disconnect the solenoid valve. You are now running a paltry 6 psi from the wastgates only. buy two fully adjustable wastgates with a weak spring and fully adjust them to the lowest they will possibly go. so the wastegate opens as soon as possitive boost is seen.
Voila no positive boost. You don't get the rush of the turbos.
or to make it a little easier, just remove the circlip on the wastgate arms, pull the arms off and open the wastgates manually, hold them in the open position. No boost !
The only other way is to remove the turbos fit two manifolds straight to your downpipe, route the oil feeds to the oil returns and the same with the coolant pipes.