Good Day!
Interesting! It would be quite simple to drive the Wastegate Actuator Solenoid with a closed-loop servo controller, to control the wastegate of a 94-on truck at whatever temp you would like. This actually came up a number of years ago, but never went anywhere. You'd probably want to terminate the Solenoid wires with a resistor, & would certainly have to have at least a boost fooler, so the PCM would think the boost was staying in an acceptable range.
I sure wish I could have pursued this, but never had the time. It sure would have been fun...
Of course, none of this applies to me now. I'm bailing on my two 95s, having just bought a 93, which of course doesn't have PCM-control for the wastegate. That's in fact one of the reasons I went backwards to a 93 - there's only two wires to the IP.
Blessings!
82 6.2NA K15 4X4 pickup, 4spd man w/ OD, 335K+ "In Rust We Trust" (parked)
95 6.5TD 2500 4X4 pickup, Gear Vendors Aux. OD, > ¼ million miles - gone
95 6.5TD 1500 4X4 3/4T Suburban, Kennedy exhaust, > ¼ million miles
93 6.5TD 3500 4X4 1T crew cab LB pickup, 230k miles