Having worked for World Products, I can tell you that race block does not necessarily refer to the part's ability to support greater output. Rather, "race block" generally refers to a semi-finished state that permits engine builders to custom blueprint to a particular spec (i.e. semi finished lifter bores) That's not to say that race blocks are without their perks. A race block may feature billet main caps while a standard high performance block will feature nodular iron caps.
I believe World has built an aluminum SBC block with the help of an eager foundry that results in a lower than normal price. I will have to look into it further. But cheapER may mean $2500-$3000
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Steve Chryssos
Ridetech.com
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