Another carb help...

[72SB]

I believe "adjustable" VA canisters are still available as Crane, now Holley, does not make theirs anymore. These are the ones that use an alan wrench to adjust when and how much VA is applied. Summit, etc sell thse adjustable VA's cans

But the "stop plate" detent is not made so a homemade version is the option

Pretty good article on the "why and how" VA is beneficial, especially using manifold vs ported vacuum for it and an adjustable VA canister

https://www.motortrend.com/how-to/16...r-drivability/