I am building a small bore 235. I am not using the '78 manifold because I am using the newer style lower unit(different shift style). With that being said, I have the inspection covers off of a large bore 235 that have the single drain port in it for the check valves. My manifold is also the 1982 v6 manifold(same year as the inspection covers). I used to have the papers to show me what check valve went to what inspection cover. I built a 235 a couple of years ago. But I can't find my papers for the drain lines. A friend of mine is checking to see if he has a copy, but can anyone out there shoot me a link for the pages or just tell me what check valve goes to what cover? The only thing I can remember is that the check valves did not get routed to their own cylinder(check valve #1 does not go to inspection cover #1). Thanks in advance