The fix in the How To section for the Throttle Hang will generally also fix the moosing. The restriction is of the idle air intake for the Idle Air Control (IAC) valve & has NO EFFECT on the main intake at the Throttle Body (TB).
In fact, if you have a manual transmission, you will notice shifting the gears of your car will become markedly smoother & easier to modulate & predict. That alone is worth the $0.30 it will cost in parts. For less than $1, give it a try. Given the info in paragraph 1 you have everything to gain.