I need an expert on the cleveland/modified series engines. im putting 351 cleveland 2bbl in a 77 f150. its a well built motor. i know that these engines had a problem getting oil to rear main. does anybody know how that oil bypass tube that goes from the side of the block to the oil pressure gauge hole work. it doesn't make sense to me it seems like it would be working against itself. or should i not worry about trying to fix that oiling problem.