holley carb guru's

no pics-- the rear left center venturi is busted at the mount - prior owner jb welded it back into place---(this is not a workable fix)
http://ataftcollins.com/images/services/engine/holley-carb.jpg


the brass circle that extends into the middle of each bore on a 4 bbl holley carb
the link has a std diagram of a holley carb-- it shows the rear 2 venturi boosters-- (the front 2 are covered by the choke plate.)

I want to know if this can be fixed or is the carb junk I'm not going to pay $$ that is close to a new carb to fix it either .

Thanks for the pm I will follow up ,Lawrence