Jay -- a couple of comments. First of all, one a car that has been sitting for a while, seeking to ensure the fuel tank, pump, filter and lines are clean is an excellent idea. I posted here a while back on my saga with rust inside my gas tank and the rather painful process I went through to address that problem.
Having conducted your Italian tune up, I suggest you ensure your carbs are functioning together.
There are two steps to what I have called togetherness. The first is to ensure the signals you are sending to your carb are acted upon in the same way by both/all of your carbs. Since the signals come from your foot, what you need to do is evaluate the linkage from your gas pedal to your carbs. This is simply a matter of observing, by sight and feel, how various parts of the mechanism move. Look over your linkage in detail, breaking it down into component parts, making sure it appears to operates freely without binding or hitching. You don't need a book for this, just separate sections of your linkage, move them and watch/feel the movement. If you have springs attached to your linkage, detach the springs and evaluate the movement first without the springs. Be sure to consider the gas pedal as part of this process. When I got my car, the attachment on the back of the pedal where the linkage inserts was broken and would collapse when I stepped on the pedal, changing the way the linkage moved when I mashed the throttle.
The other main step in togetherness is synchronization. You need a special tool to do this. Thus, I suggest you buy a synchronizer (
https://www.piercemanifolds.com/product_p/ste sk.htm) and learn how to sync your carbs. This process is specific to the carbs you have, but in general this process involves making small changes to component parts of your linkage to ensure that your carbs flow the same amount of air at idle. This can be tedious, but is not terribly complicated.
