[Old Guy with 87 GT]

yep...mass air computer cars only use the map sencer to read baromertic pressure

as long as you have a mass air meter then you don't need a vacuum line ,the map sencer for both cars are identacal parts and can be interchanged .....but the map sencers for mass air cars have a little plastic peice on the vacuum input to avoid a vacuum line being hooked up to them ......but it still is the same part

a mass air car measures engine load via the air passing though the mass air meter ,but it will use the map sencer to determine the baromertic air density for tuning reasons (measures altitude ,barometric pressure,ect) .......it only takes a reading from the sencer when you start the car.....then it moniters the mass air meter to determine engine load

now a sped density car uses the meter to measure barometric pressure and to measure engine load ......it takes a quick reading when you start the car up and then it uses the meter to moniter vacuum levels so it can determine how much load the engine is under .....

hope that helps to explain ,as far as i know there isn't any call for a vacuum line to be hooked up on any of the mass air computer cars (89 to 97)