Yes, non-English (such as Alfa) knew to avoid Lucas when they could. The Giuliettas were pretty much Lucas also with Solex (I believe) carbs. For the Veloce Giuliettas Marelli went in (particularly the distributor) and sidedraft Webers replaced the Solex. These are swapped in by some anting to disguise as a Veloce, but there are about ten other ways to find them out.
Anyway, I used to have good luck with SU carbs -- they can be made to be higher performing than others of the day, which is saying a lot as the general design was developed in 1906. The tweaking is easy once you get it... the problem is you are ALWAYS tuning and adjusting them, especially when you have two or three in concert, or NOT in concert. The Astons made use of the Skinner's Union carbs also, and they seem the only ones appropriate to find under the bonnet -- at least esthetically.
In any case, these fuel injection pumps on w113 or w198 are giant steps forward of course, and they are one mark of very high end european (non-English) gasoline vehicles from the era, as far as I know. I wish wish I knew something about them... I haven't a clue.
1967 230SL (Manual, rustless driver)