There is no easy way of advancing the timing on a 97. The 97s have electronic ignitions, and the computer sets the timing off of a sensor looking at a 36 - 1 tooth gear on the flywheel ( crank positioning sensor).
I believe the 97 guys (or OBD2) run bigger injectors when increasing air flow to compensate since the ECU may not be able too.
Don't forget to
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first then ask questions later! The loose nut behind the wheel