I'm building this mid mount turbo setup. I'm at the point of running the oil return lines. i was going to drill and tap the valve covers. Its a fair amount of work I'm not really sure i need to do. Upon looking at his I'm wondering if its possible to just drill and tap the oil fill tube? It would be a whole lot easier and i think it would work. The crankcase vent line that ran to the original intake was going to be vented to atmosphere anyway. Any help here would be great.