My club brother Tudor bought an A/V8 tub a couple weeks ago, and while it's basically a solid car, there are a few bugs, including a very sluggish engine. 59A flathead, only visible modification is Thickstun intake with 94 carbs, one of which is blocked off with a plate between carb and manifold. Manifold has cast in number "PM7". There is a bit of doubt about whether this manufold is a conventional 180 degree with only small balance passages between front and rear carbs, or a 360 degree common chamber feeding all 8 cylinders. I'm thinking it's a 180* and another old fart like me is thinking 360* Obviously if it's 360* it will run OK on 1 carb, just not breathe as well as it would with 2. But if it's a 180* and you're trying to run it with one carb blocked off, there's gonna be 4 cylinders only getting what air/fuel mixture that can get thru the balance passages, which ain't much I haven't been inside a flathead in about 50 years, and the only Thickstun manifolds I ever saw were in magazine pics, and I don't recall seeing a pic of the Thickstun's underside, which would reveal whether it's 360* or 180*. Anybody out there that knows from personal experience whether it's 360* or 180*, please respond.