big Block Oil Mod???

Would love to oil my rocker shafts from the rear galley holes and get rid of the cam bearing method. Never have seen this done before on stock block and heads. 440/906/solid cam. Seems simple, fitting in one galley hole, other kept for gauge. Simple lines through the VCs and plumb into end of rocker shaft. 440 Source rockers and shafts. Am I missing something? Anyone ever do this?