holley 4160 help. 600cfm.

chris17 said
Yes Rick, my vacuum is at 12-12.5 at idle, in drive. It does feel more balanced out on a 1/3 throttle take off now with the 8.5 power valve. Is this a typical result? Also could I go fatter on the jetting you think?

Yes, the enrichment is now occurring with a little less throttle opening which is what I believe is needed in many circumstances.

chris17 said
And finally, I have looked at purchasing the metering plate adapter for the rear so I could use standard jets, wondering if I should be making changes there since I have went from a 65 to a 68 on the primary? And I am running the lightest spring for the secondary actuation.

As far as the plate or conversion and jetting, could you confirm which carb you have. I'm guessing it may be a 80450, 80457, etc. and not a 1850-? Could you give me the list number off the air horn.