Cam Rules!!!!!

More duration less torque

Increase lobe centers less lope

Increase lift more torque

More intake more torque

More exhaust more revs

The bigger around the more HP

Exhaust valves are smaller than intakes cause you can push more air than pull

Gmc's are faster than Chevy's cause they are bigger and longer.....and you can get a 12port cross flow
head....NEW

If I was standing in front of Chevy I'd have a Turtle suit on!!

AND Tony??? When was the last time you drove either one a those trucks really fast??

NOT WITH JOY LOOKIN'