It don't matter were you put it but the farther from the turbo the longer it takes to build pressure.Go on ebay buy a single acting air cylinder spring return and use vacuum to apply it ,should be at least 2 1/2 bore and 2 1/2 stroke take the vacuum from the vacuum pump thru a solenoid.
__________________
98 12v,2wd twins,3:55,g56 6speed,elec fan clutch,100 hp sticks, 10 plate FF aFC fB,3gsk Valair ats,fluid damper,60#springs,o6 exhaust brake,High Idle,prime loc, 4"exh,piller mount