Dialing in a Carter AVS

I used the Edelbrock strip kit in my 625 Carter AFB, 2 step rods. Direct interchange between jets, rods, springs. Your AVS has 3 steps. See if you can download the tuning guide from Edelbrock as it's very useful. If you can't find it call their tech and tell them you have their carb and they might send you a PDF.

I'm no expert but I'd say the 3 step will give you more precision during transitions.

This carb is on my warmed up 318 and the plug readings are the best on any old car I've owned.