MAF to MAP

[the Fredericks]

I'm working on a couple of microcontroller projects, and was wondering if
anyone here has ever "mapped" the MAF signal to a MAP signal.  Is that
confusing enough?  In other words, I'm using a 68HC11 mcu, and want to use
one of the PWM outputs to emulate the MAF signal to a stock ECM.  I'm
planning to try running the car with the MAF still in place, and a 3 bar MAP
hooked up, and data logging the two signals vs. RPM.  Then making a 2D
lookup table for the mcu that would read the MAP and RPM, look up the MAF
value, and output it.  Does anyone think this will be sufficient, or would
it need more dimensions, like maybe delta TPS for accel/decel?

Thanks for any opinions,
Kendall Frederick