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yes they are the same block but for some reason you can use the 2.9 heads
on the 2.8 but not 2.8 on 2.9 due to the fuel injection i think the intake ports are different
Not even close guys, the 2.8 is a close relative, not a twin,
to the 2.9. For one thing, the 2.8 has a gear driven cam,
where the 2.9 uses a timing chain, the 2.8 heads have a
different intake/exhaust pattern, and the cams are different
because of this... So the only major items that will swap
between the two are the crank and the bell housing...