455 Engine bored .060 & destroked to 437 CI with 700 naturally aspirated horsepower. Studded & o-ringed. 425 Steel crank. Mondello kit Childs & Albert aluminum rods with 12:1 Arias pistons. Engle roller 704/712 lift with 318/328 duration. Dual four Offenhauser with 425/250 HP Compucar nitrous plumbed. Mondello worked iron heads. Have other intakes & distributors to choose from. Too much to list. $5,500 short or $10,500 for long block. Trades plus cash.