670 Truck Avenger carbs jets
I know there are dozens of treads on jetting these carbs, but I have never been able to get a good answer on why Holley put 89 jets in the rear on these stock? Typical rule of thumb is 8 sizes larger if no power valve, not a 21 size jump . That Holley tech on their tech support didn't have an answer.
1977 J10 360 4bbl 4" lift w/33s
1977 J20 401 4bbl 7" lift w/37s
2003 Rubicon 4" lift w/33s
Last edited by Maherpmj : 08-01-2020 at 09:16 PM.