Would they take the screen closer to the turbo or the first on that you see when you remove the sensor of does it make any difference .
Sometimes I let myself get caught up in very minor things with our cars that at the end of the day don't mean jack shit LOL
It was the one closest to the turbo. Air flow wise I don't think it makes a difference, but the air is straightened by the front screen and goes across the heated resistor thingy more evenly for a more accurate reading.
Screens .vs no screens only matter on the stock POS. It uses a film type sensor that lays flat relative to air flow. Any tumble or turbulence will cause the same air to 'hit the film twice' and send out a false reading. Rough air will make the sensor think you're moving more air than actual. That's why the factory used a hex nut to hold down the factory airfilter instead of a wing nut, like normal. The ears on a wing nut would screw with the MAF readings depending on how they were clocked when they were tightened down. Even the factory knew in the 80's the stock MAF was borderline.
The LS1/LT1 sensors use vertically mounted round sensors that don't have those design limitations. There's also three of them, so there's built in redundancy. I run the modern MAFs witthout screens all the time.