Jim, it is very rare to be far off the stock setup, especially as far as you were from 54 to 62
When you pull the plugs, realize most driving is a combination of idle, transition and main circuit, combined with the accel pump slamming extra in there.
To read plugs to determine jet size, you almost have to run a full throttle down the quarter, and then shut it down and tow it back. otherwise all the other circuits influence what you see.
My opinion, if you have to go more than a couple jet sizes fat, you either have a PV timing issue (too low a number delaying it too far), you are bandaiding another problem, either in the carb or otherwise, or you are just overfueling
Keep in mind, that is entirely possible that you would end up bandaiding the carb to make it run decent with Street Avengers though, I have had nothing but disdain for those carbs and how they handle the transition and main circuits, especially in hot environments. Keep in mind, this is of zero importance on the drag strip or dyno, but in traffic, they can be annoying.
In the end, the issues with Holley SAs and some HP series are best fixed with an earlier style metering block, in fact, if I bolted an SA on now and experienced the common transition stumble, I'd likely just swap without spending too much time on it.