No, the leaks will show up between the head and the intake manifold, not the intake manifold and the carbs (although that will happen also...). The intake manifolds are aluminum, and the exhaust manifolds are cast iron. The "wobbling" of the carbs causes the intakes to bounce up and down wearing the tops and bottoms. Try spraying carb fluid or water between the manifolds and the head when the engine is hot and running. If you get a change in rpms, you have a leak. Can't balance the carbs with a leak... Oh, and NO amount of gunk will fix it. Been there, tried that. If you have an intake leak, let us know...

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Bill Streep
San Antonio
'57 190SL (toy)
'08 S5500 (mine)
'09 CLK550 (wife's)
'06 SLK350 (daughter's)
'11 GLK350 (daughter's)
'03 CLK310 (spare)

Bill ... Permatex #2 (non-hardening type) liberally spread around the manifold joint will work but is very "tacky". I ran that way for a number of years. You still need the carburetor support (I use two, one for each carburetor).

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Jim Villers
190SL, 230SL 5-speed, 95 E320 Wagon, 01 E320 Wagon, MGB, Boxster 'S', 190SL "Barn Find"