Holley Jet size

Unless you like buying plugs, start with ootb tune/jets. A slight lean wont hurt anything while sreet test n tuning -driving it easy . Check vacuum at idle and cruise fir power valve tune...Drive it mellow, roll the throttle at first...cruise and set/figure primary jets...then do some short wot.


This exactly. There is a mega difference between just touch lean of MBT and actual lean. What most guys call just right I call pig rich.