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#26
03-20-2025, 09:35 PM
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6X-4 are better heads with a 400 for what was described, and have induction hardened exhaust seats which is much better for daily driving, use the Summit cam you already have and use the 6X heads, or could keep the stock 254 cam, either one you could run on 87 octane with the 6X heads. The 15s would require 93 octane.
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