I think it's a tough question to answer. I'd try a size up on the nozzle & see what happens. If nothing try a size down. one way or another you should notice something. I had a 850 on a BB chev that bogged a little as you describe. The car had huge gearing so there was just no getting around it. I had the carb set up as good as it could get. I switched to a 650 carb & the car ran great. Your car isnt a 59 Cad with 2.92 rear gears though
. My guess is that the squirter may remedy the problem.