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Discussion Starter #1
Just curious......Is the 2.5 in the s-10 the "Iron Duke"/Tech 4 2.5 found in the fwds(ex. Grand Am's etc..)? I imagine it is, but just wondering. Also is there any performance upgrades any of you know for it?

Steve
84 GMC Jimmy
 

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clifford performance has a header, crane cams, lunati, and comp cams all have cam and lifter kits, there is a DOHC 4 valve head from cosworth out if you have 10000+ to spend on it, GMPP has aluminum heads for it. there are a few slight differences between the fwd and red blocks...im not sure what they are.
 
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