STEVE BRULE DYNO TUNES THE HOLLEY XP CARB ON A 408 STROKER. WHAT HAPPENS WHEN YOU ADJUST JETS, POWER VALVES OR AIR BLEEDS ON A HOLLEY XP CARBURETOR? CHECK OUT THIS VIDEO WHERE WESTECH'S STEVE BRULE WALKS US THROUGH A TYPICAL TUNING SESSION ON A CARBURETED 408 STROKER (351WBASED) SBF. ARE THE CARB CHANGES WORTH ANY POWER? WHAT HAPPENS WHEN WE ADJUST THE TOTAL IGNITION TIMING? FIND OUT HOW TO DIAL IN A HOLLEY CARB WITH STEVE BRULE AT THE HELM.