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Idahome
Joined: Wed May 2nd, 2018
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I have installed countless 4.0 from 95+ trucks into gen I trucks, detonation has never been an issue even with 91-94 computers.
Did you do anything to the 97 block while it was out? Lower intake gasket? Oil pan?
That is a killer deal on a 97 ohv engine and trans!
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I build custom RBV, specializing in drivetrain conversions, wiring, suspension and complete custom trucks