Over-50, know that the DeTomaso community has found at least two Edelbrock intakes for 351-Cs that were built wrong for big-port aluminum heads, and WILL suck oil from the valley chamber. This is due to too-thin bottom flanges left around all the intake ports, which sucks gaskets or silicone sealant inside the port bottoms from high manifold vacuum. Edelbrock warranties such manifolds if that's the cause of your oil consumption.
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