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Discussion Starter · #1 ·
Ok, I've read Tim Weaver's article on the 4.0 head conversion for the 4.2. The article claims about a 40 hp increase. Has anyone done any actual dyno tests on a converted 4.2L? What I'm really interested in is the torque figures between 1800 and 2000 rpm? Any test data or website info on this subject? Thx.

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