Changing Cams

after reading into tuning Holleys, I think there is about nothing that a wideband and a set of pin drills cant do to a Holley to make it run right. Of course your other parts have an effect. I ran a 284/.484 MP cam and had great results on a 68 340. 800 idle in gear, 3.91 rear MP 2500 convertor. If you pull the cam, keep the lifters in order...just in case.