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Twedt then explained how he prepped the block, “First we calculated our assembly height. This was done by checking our connecting rod (6.385 inches), adding half the stroke (2.125 inches), and then adding our pistons’ compression height (1.270 inches). This gave us a 9.780-inch assembly height. From Dart, the block measures roughly 9.810 inches. We don’t trial assemble or mock up engine assemblies. If you buy good components from trusted manufacturers and use proper machining processes, you don’t have to worry about being off when you assemble the engine. We simply square decked the surface of the block 90 degrees off the crankshaft centerline and 45 degrees off the cam centerline. Using torque plates we bored the block to within 0.0055 inch of our finish size before honing. We then honed each cylinder in five stages. For this engine we set the piston-to-wall clearance at 0.0045 inch.