those carbs, if i remember correctly, come with .031" squirter and a white 218 pump cam in the center. i always ditch the big squirter and go to a .025" or .028" with tubes on that small carb. a green pump cam may not hurt. they did come with 64 jets in the center carb.

now let me piss you off. if someone told you to take those carbs off and put a 1050cfm dominator on that 360 you'd say they were crazy. have you ever done the math on them? those deuces have nearly the same venturii area and air flow combined as a 1050 dominator, (factory 6-pak cfm rating was 1030cfm). plus they're not velocity controlled. when those things are opened up air velocity comes to a crawl. no velocity/pressure differential equals no fuel drawn from the bowls. i ran those carbs back in the day for awhile. easy to tune, can be made to drive nice, but absolute torque killers in small engines. the 340-440 vacuum 6-pak carbs are too big for a small engine, and they're velocity controlled.