Whoever told you that a new MAF was required is an idiot. Don't let them breed.
Whatever mechanic told you you'd get an SES light is a liar or a fool. Don't go back there.
I have some car experience, I worked as a Parts Mgr for Dodge between 89-95. But I don't spin alot of wrenches. I too was frustrated with these kind of remarks and was not sure what to think. My personal opinion is they did not want to modify existing parts and be responsible for problems afterwards.
There are not alot of shops in the area that are not "chain stores". The speed shops are geared for rear drive racers for Gateway Internationals dragstrips.
Turbo Connection is the top notch speed shop for turbos and superchargers, but he thinks hopping up the Bonnie isn't smart because of age and vehicle type. He prefers 2-dr cars, Grand Nationals, and Mustangs. He has a twin turbo GTO 6.0 that dyno-ed at 1050 hp! He is cool but did not want to get too involved. He is particular about what is under the hood. He did say, whatever parts I brought him he would install though.
I can do the work, I just want to make sure I don't screw anything up. Mainly because I am married and do NOt want to answer to the Warden!
Mounting the tube looks easy enough, a rubber coupling from the throttle body inlet to the pipe. Then run the pipe like yours is to the original filter box location. Attach the K&N to the tube.
Building the heat shield may take some more work. I will look into the threads on that.
Looking for pics to help visualize it.