Modified XJ Cherokee Tech XJ (84-01)
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Block selection

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Old 06-13-2012, 10:25 AM
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Default Block selection

I have concluded that i wish to build mid level stroker. Mid level being, not a maxed out racing stroker but a couple levels up from the bottom. Or call it stage 2 out of 3 stages of performance.
Any how, what im after is engine block info. Are the 4.0L blocks all created equal from 85-01? Perhaps someone has heard of a certain year or years that the blocks dont hold up to modifications very well? Im going with an aluminum head and all aftermarket internal parts. But as I shop for a good used block to build my engine off of, is there any red flags to watch out for? Are H.O and newer blocks better than pre-90's 4.0L blocks?
Obviously I'm to watch out for critical damage from parts failure and stuff like that.
Thank for any input you can give me
Old 06-13-2012, 10:34 AM
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Some argue the renix blocks have higher nickle content that makes the blocks stronger and a stock cam that is better for strokers. Others argue the 96+ or 97+ blocks are stronger due to more ribbing in the block and main bearing cap girdles.
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