Why would you do that  Why render that metering circiut useless 
On a normally aspirated motor, vacuum drops off to near zero at WOT and the metering rod springs push the rods out of the jet to richen the mixture but a blower will create plenty of vacuum at WOT...at high vacuum the metering rods will descend into the jets and lean the mixture at a time when the most fuel is needed; in many cases this will cause a lean backfire through the blower or might burn pistons...AMHIK.
In the AFB/Edelbrock there is no separate "metering circuit" as in the Holley, the metering rod merely increases/decreases the area of the primary main jet to control the mixture.
Stiffer springs will only delay the descending of the metering rods, if enough vacuum builds at high RPM it will overcome the springs and lean the mixture then.....POW!!!! BTDT and have the busted parts.
The INTERNET, the MISinformation superhighway
| 
