[QUOTE=rusty70f100]No, you cant. They widened the oil pan rails when they went to the 4.0L. It would not clear.

I Have a 2.8 block on an engine stand in my garage right now WITH a 4.0 crank in it. there is hardly any block indexing to do (for the crank)

Also 2.8 head intake runners wont line up with a 2.9 intake.