no tvis i know its a small port just didnt know what series, but doing some research ive found somewhere saying it may be an extra overflow for extra oilsquirters for the pistons or something? only asking the question becasue he has that and another 7 rib block that was given to him with out the oil return and just wanted to know whether there would be a difference in the block as to one being better to build as a turbo block?
