Dartfreak75... Quick TQ tuning tips Video I made for you

agree. I've tuned the metering rod hanger adjustment for cruise on long trips at freeway speeds. I use the color of the tailpipes to help me judge the cruise mixture adjustment. Of course this is after you've already settled on the best rods for power, midrange, and cruise and installed them.
I always sanded the bottom (skinniest) part of the metering rod some. I'd richen them up this way, but wouldn't have that effect till mostly into the gas. Most of these TQ's I used came off of maxi vans, or mid-70's C-bodies, and they all had single exhaust.

Another note I forgot to mention to folks new to TQ's is that when the motor is running, vacuum pulls against the metering spring and pulls it down.