Holley 1920 replacement

It had a rebuilt carb when I bought the car and I rebuilt it. There's a leak at the throttle shaft. If I spray carb cleaner it idles better and the engine speeds up.
Will a super six manifold and carb bolt up without modifications? Thanks

Vacuum leak at throttle shaft? Unless it an be bushed and fix this problem, it will never run right from just that. It is wore out there, GET a better carb!! and go from there.