I started getting the Holley 850 cfm double pumper ready for the challenger,I did a quickie cleanup and added a chrysler throttle lever extention  HolleyP/N 510-20-7

I also had to change the power valve from the stock 6.5  to 3.5. The method to determine the correct power valve is to take a vacuum reading and divide it in half. I had a vacuum reading of 7 inches which gave me 3.5. here I am getting "intimate" with the power valve to make sure it works.

 Heres the 850 installed and ready for action! next on the to do list is to get the slicks mounted and install the long lug studs on the axles.