Holley 4160 318LA Bog Under Load

Before tuning the carburetor, it is imperative to get the timing sorted out first. Where is your initial and total timing?

Also, it you have been watching Holley videos, you know there is an order to tuning a Holley carburetor and if you miss one step, it nullifies the next. So it's important to follow the tuning steps in order, or all is for naught.