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NMCA rules ban adding metal or epoxy to the cylinder heads and intake manifold, which makes the AMX's 900-plus-hp output even more impressive. Dry-sump oil systems are also prohibited, so builder Barry Allen bolted a belt-driven pump to the mill using a drive system adapted from a big-block Chevy. To optimize sealing with low-tension rings at high rpm, a vacuum pump evacuates the crankcase of fumes. Inside the block are roller cam bearings.