Pure Grunt
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The challenge with a big-cubic-inch engine is keeping the compression ratio low enough, but that was solved with extreme-duty blower pistons (PN 194888) with 36cc dishes. The Dart block was milled to a deck height of 9.3125 to achieve zero piston deck clearance. Combined with Fel-Pro 1004 head gaskets, the big small-block has 9.3:1 compression, running easily on 87-octane even with the smallest cam and biggest loads. Tim Martindale at Dougan's blueprinted the heads and determined that the 1.427-inch-diameter valvesprings included with the Dart assemblies would work with both the cams we wanted to run: Spring heights were 1.760-inch intake, 1.775 exhaust, and set up at 150 pounds seat pressure and 370 pounds at 0.600 lift. View Related Article
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