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4.2 vs 4.0

481 Views 3 Replies 2 Participants Last post by  Sycho15
I have a 4.2L with a Weber 38deg carb and GM HEI distributor (hey I got it before I knew about this Ford thing.) Before I go putting a cam and headers and all that good stuff on it, I want to know if y'all think it would be better to swap in a 4.0L from the junkyard or just take the head off the junkyard 4.0 and put it on my engine. Keep in mind I do a lot of 'wheeling where the engine is underwater.

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here's my motto.. go with the cheapest.. if somehow you can get your hands on a head and efi.. go with it.. but probably easier to find the whole 4.0.. and unless you have already done some work to the 4.2.. i would just do the work to the 4.0 and install that.. but make sure you get the fuel injection if you do go that way

survival is instinct, but living takes guts
The 4.0 head swap works great by all accounts, but the 4.0L HO is a very good engine and if you can get one on the cheap I'd put it in. I have seen guys talk about using the 258 crank in the 4.0 but I don't know the details. Might be worth looking into.

4 Wheel Parts Wholesalers are a bunch of F-in' crooks and need to be run out of business.
Well, I can get the whole engine from the junkyard, I'm not sure what they would want for it but it couldn't be more than $500 complete. I can probably pick up the head for $100. I'm worried about the computer and all the wiring in the water though, as it is not uncommon for my Jeep to go hood-deep in the local rivers and ponds.

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