Just a note for the OP: A big carb versus cubes is going to be a lot touchier to get the mixture right across the idle and transition phases of the carb operation than a smaller one. In fact, with too big a carb, it may never be fully correct all across the low end RPM operations at light throttle and idle; the fineness of adjustment is just not there, and the transition operation in particular assumes a certain % of maximum flow versus RPM and throttle opening; you are undoubtedly operating below that % flow with the large 1050.
That is the compromise that you are making with the 1050 carb to gain that 20 HP on the dyno. One question you may want to ponder is if that 20 HP is of that much value in your use of the car and engine; sometimes, people get too caught up in every last HP on the dyno and lose sight of actual operation. Spending a lot of time idling and at lower RPM's points to a smaller carb.
