pcv sucking oil ?

is this carb a double pumper if so adjust the secondary pump to .030 and then more if needed. there is also a second position on your pump cam that may help you if you change that. i would not think it to be a jet size issue. if the smoke is on initial throttle push wide open. if it is blue smoke on initial push on hard acceleration. i would suspect guide seal but you say there is no smoke on first start up so i would guess that the seals are ok. if this is a vac carb you can do the same to the pump on the primary and see if it goes away but you may develop a hesitation on light throttle.