I Second What Turk Said, And Only If You Ard Moded.
Also V-force 3's Pull A Much Better Signal Than Stock Reads, That You Will Probably Have To Go Down In Jetting.
Example...my Viper Has Cpr Pipes And V-force 3's And The Carb Are Vented. Cpr Jet Specs Are P=160 C=160 M=162.5.
With The 3's.....................p=153 C=153 M=153.
And The Piston Wash Looks Good At 12 Deg On A 1500ft Run.