Thread: Total new guy question about intake swap

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One thing way too many people over look when swapping intake manifolds is the relationship to the intake ports in the heads and intake runners on the intake.

You may want to do a little work and investigate the port size and configuration (I'm not a chebbie guy they may all be the same for the SBC) if they are mismatched you are losing power. You can either match port the new manifold or find one that already matches.

The oil filler tube is no big deal, do as already suggested here. Indeed anything you pour into your engine, whether it is in the valve cover or galley will drain to the oil pan where the rods are, so take care not to drop any foreign material, water gasket material through the passages in the galley / valley pan area.

It is a common / popular thing to remove the oil filler tubes on old manifolds to make them look more contemporary taking the tube out and replacing it with a freeze plug.