Just a heads up ,You can't just bolt 3 stock carbs onto the manifold and expect it to work , You have to remove the choke plate and idle circuit on the front and rear carbs and add a progressive linkage , Only the center carb feeds the engine until about 20% throttle then the outer carbs start to kick in .check out Speedway motors and a uni-syn
For years customers have been either putting up with poor idling multiple carburetor set-ups or spending hundreds of dollars converting the secondary carburetors so they did not have to idle circuits
https://www.ebay.com/itm/Uni-Syn-Car...-/151717668361
https://www.speedwaymotors.com/Garag...sh,250690.html