Yup, those old intakes had the filler tube up the front by the thermostat housing, they stuck out like a soe thumb in the publicity photos. Down the other end of the motor or manifold, I am not sure, cannot remember, they had an oil vent tube hanging off the motor that vented directly to the air. This was in the days before emissions. So you would be looking back at say a 1967 and earlier engines. It would not be legal so you would probably have to do as Denny suggests and cobble up a PVC system somehow to comply with the EPA