Originally Posted by ou812
I sealed my 6PK scoop to my carb... worth a tenth and 1.5mph. Removed it and jetted down, lost everywhere...jetted back up and gained some, sealed and gained all back. Jetted up from there with it sealed and lost.
Working on the car, specifically the front and rear suspension, and launch were the biggest gains.


Working ON THE CAR can be huge!

Once upon a time...

Roller cammed 440 in a back half E body. 10.80's @ 124. Fresh trans and tuned up converter, new HAL (now QA1) adjustable shocks on all four corners, opening valve lash .010: 10.40's @ 127 were the result. Added a rear tire that was 1.5" bigger in roll out: 10.30's @ 128, best of 10.36 @ 129.

10.80's to 10.30's and other than the valve lash, never touched the motor, or the tune up.