Gasser pistons 6.33 to 1.LP pistons 8.33 to 1. Your neighbour may have forgot to tell you that they pulled the dry sleeves and are running over size pistons. Given that a stock 400 made 50HP. I would believe 60HP if the sleeves were pulled and LP pistons used. More if they knew enough to get the worn cam ground with a modern profile and followers trued up. A three angle valve job, blend the rough edges out of the valve bowls and match the ports to the manifolds. She would be pushing 70HP. More yet if the rpms were dialled up to 2100-2500. How else would a" stock " M built as such are so popular with pullers.
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Today's Featured Article - Oliver 550 Clutch Overhaul Tips - by Greg Sheppard. I got my 1964 Oliver Model 550 (serial 141-139-519) second-hand and used it for several years before the clutch began to slip. After taking up the pedal linkage several times I saw it was going to take more than that. The engine had been leaking oil at the rear seal and I suspected
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