I do not have personal experience with a supercharged Toyota.
One possible option for an OBD1 GM computer (with MAF) would be 16183247, which was mostly used for the 94 - 95 Buick V6 supercharged vehicles. Additional information is linked here: http://www.gearhead-efi.com/Fuel-Inj...47-16197428-5b
Another possibility (without MAF) would be to install a 2 bar MAP Sensor on OBD1 computer (16197427) so the 0v ~ 5v MAP Sensor will be "Tricked" into providing a voltage with boost.
dave w
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