I modified a TQ for my 440 by drilling out the secondary air bleed orifices located under the two cover plates for the metering rods. I also ran #1997 rods back then. This would lift the car up when I even cracked the 4 barrel open. I tried the .134 jets and went back to about .124 with more bleed air coming in to mix the fuel up sooner. The drill size was .040" and I drilled the pump squirters to this size also, with an added hole in the pump arm above the highest one for more leverage. THIS WAS A PERMANENT MOD that will ruin your TQ for any other motor, but man did it work for me. I only ran vacuum advance in the cold weather (drove it all year) and used the lightest spring in the distributor with a stock high-rpm spring. It advanced quick but didn't keep going... knock stayed away. This is on 1980's pump gas so... just throwing that out there. I love TQ's and still run them WITH GOOD FUEL now!