89 MAF Volt to freq conversion

[Thomas Matthews]

In the ECMguy's hack of the 86 '165 bin, he has a flag for MAF type, voltage
or frequency... Does anyone know if this is present in the 89 ARAP ($6E)
calibration, and if it is there, where it is?
Is it as simple as flipping the volt to frequency flag, and recalibrating
the calibration to use a newer, higher flowing GM MAF, such as a LT1 sensor?
He also has 6 tables that define the range of a frequency MAF, but in the
showing of the tables he has voltages- would these be the ones to adjust?
Is some other part of the program performing a conversion from voltage to
frequency that I have missed?
Also, I've seen numerous references to VATS- I thought it did not come along
until '88.
I remember that some were heading this way a few months ago, but haven't
seen anything recently...
Thanks
Tom