To check the float your going to have to do a visual inspection. Considering the headaches your having, after confirming ignition is proper, Get a rebuild kit. for the carb. Find a large table, & an old white bed cover, Start your rebuild process. I have had this problem before. I cant answer what the actual problem was because sometimes its easier to just overhaul the system. As for accel. problems on inclines, these OEM carbs suck. You'll need to go to holley & by a truck kit. Otherwise a built 1406 or 1407 has always been my fav. Hope it helps.