[Lee H]

Please, don't take offence, maybe your trying to accelerate at to low an RPM in to high a gear? Points or HEI? How long since a good old fashioned tune-up? Before going to the carb again I would make sure your ignition system is operating properly. New points/condenser, check OHMs of each wire and replace any that are not within spec. Make sure number 5 & 7 wire are not touching each other, they are next to each other in the firing order and can cross fire causing missing under power. Worn out plugs/cracked porcelain? Plug gap? Most of the old timers are going to say 90% of perceived carb problems are ignition problems.