The bore spacing remains the same as a Coyote engine, enabling OEM cylinder heads to be used, but they did increase the deck height to address the displacement concerns. Other notable highlights of the billet block include a larger crankcase area to accommodate a longer-stroke crankshaft. Additionally, MMR incorporated larger main cap studs—the inner studs are 1/2-inch and the outer ones are 7/16-inch—and there are four side bolts instead of two for the main caps. The head studs are increased in size with a unique 9/16 stud that necks down to 1/2-inch threads that go into the block. According to Luton, they can torque the heads to 135 lb-ft on the torque wrench, and it works just fine in MMR’s 3,100hp Pro Modified engine.