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The business end of Dart's SHP short-block looks like it could survive a nuclear strike. Thick internal bulkheads are matched by massive steel main caps, the second, third, and fourth of which have four bolts, with the outer pair being slightly splayed. Like the blocks, these caps are machined in-house at Dart. Notice how far the bore castings extend into the crankcase for piston support throughout its stroke. Main-journal diameter is a Cleveland-style 2.749 inches, and the muscular bare block weighs in at 195 pounds.