Quote:
Originally Posted by Super Bleeder!!
Most products need a market before they'll be released.
In this case, there isn't one. 
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Exactly. Dart makes blocks for engines like the ford 302. When an engine is known to have a weak point of 550hp like the 302 the Dart engineers design a block that can surpass that because people are willing to pay for it.
Think of the high HP 4G63s that are out there. I am not sure how much power the most powerful is pushing but it is obviously know that there are many in the 600+ range with nothing more than aftermarket internals.
The 4G63 doesnt need its webbing and reinforcements redesigned, there is no demand for it.