While you're down at the auto supply getting those fittings, also take the base gasket that was supplied with the carb. Ask them to find you an OEM spec thick insulator gasket that has the plastic inserts around the bolt holes. From my experience, the gaskets supplied with many of the replacement carbs are the thin, cardboard or rubber ones that not only can put the carb throttle plate too close to the floor of the plenum of the manifold but also are prone to not be very durable. I've had much better luck using the OEM spec thick insulator gaskets like the vehicles came with from the factory (with the plastic bolt hole inserts, the possibility of cracking the base plate from uneven torque is greatly diminished too!). I also like to put a thin layer of silicone sealer on the mounting area on the manifold that the gasket will touch--makes removal and related clean up much easier should the gasket ever have to be removed from the manifold.
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