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  1. Highwaystar

    Who has the best 451 crate motor with cast heads that makes 500 HP

    Like I said earlier looking for header clearance, spark plug maintenance ease, and I don't need 650 to 800 H.P. I've had it. Just looking to build a 500 H.P motor for a stock factory appearing 70 Roadrunner, and I think a 451 is a good candidate to make that easily on pump gas, and the stealth...
  2. Highwaystar

    Who has the best 451 crate motor with cast heads that makes 500 HP

    Cast Iron heads for a factory look. I know it's easy to build 500 plus HP with aluminium heads. There were a few companies making crate 451 motors with cast Iron heads in the 7K price range a few years back. Also like the extra header room and room to change spark plugs. Excellent rod ratio.
  3. Highwaystar

    Who has the best 451 crate motor with cast heads that makes 500 HP

    Likely make more money on custom engines, and don't really have to warranty rotating assemblies. Warranties are stuck on the local machine shop..
  4. Highwaystar

    Who has the best 451 crate motor with cast heads that makes 500 HP

    Cast Iron Heads, Intake to oil pan as Crate, Has anyone used Muscle motors??
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