[Dragncar]

Originally Posted by 67GTO4SPEED

No disrespect meant at all to Alan Johnson, but they didn't exactly reinvent the wheel with the 481X. It's basically a Billet version of a Big Chief with the cam raised and pushrod moved around to improve valvetrain geometry. It has a standard 4.840" BBC bore spacing, and uses a BBC crank, with optimized bearing sizes, an 8 bolt Hemi flange. The block height is 10.4" and they are a 4.5" bore engine, so they've aren't some huge bore, stretched block monster that many assume them to be. The center 3 mains are crossbolted and the block design honestly looks just like a shiny Big Chief block.

They are great engines no doubt, but they are honestly an improved version of a tried and true design that has been around quite a while.

Winner winner chicken dinner!!! That is the info I have been waiting for.
Thanks, told me what I needed to know about the engine.