Join Date: Oct 2000
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Re: swapping 258 for 4.0 (242) questions
I was confused because the 87 wrangler came with a 258. So it would have the 4.2 in it. Then they moved over to the 4.0 in 90-91? not sure.
I would think the block woudln't have a problem bolting in, but i've never done it so am not sure. The distributor on my (88) is on theb left of the heads as you look at it on the front, not sure where it would fit.