Selecting power valve method Holley 4160

I’m thinking primary’s will be around 68-70 as well.

the carb out of the box had 66 primary and 67 secondaries metering plate and always felt it had a lean surge. (I swapped the plate to run conventional jets in the rear)

The 72/74 ran great no surge I don’t see any soot on my bumper or any smoke at WOT, so I believe I’m close

Thanks guys I’ll let you know how it all goes