advice on 4.0 head swap

[cj7pimp]

i have an 82 CJ7 with the AMC 258 i6 / 4.2l and stock carb. i am looking to get a 4.0 head and also do the fuel injection on it. i can get an engine from a 91 xj that has 205000 miles on it for 300.00 with all pieces and computer and harness. would this be a good deal or should i just pull a head from a junkyard and all the pieces i need from there. also looking to do the serpentine swap. might be able to get entire engine a little cheaper. any suggestions would be appreciated. thanks!

 

[cj7pimp]

nobody has any input on this as to whether or not i should buy the engine or get parts from the junkyard.

 

[mtnwhlr]

I would just put the 4.0 in instead of trying to get the head and fuel injection to work on the AMC 258 i6 / 4.2l . I think the 4.0 high output is great engine.
this is the way I'm going when I have the funds and a garage to work in.

 

[cj7pimp]

yeah that could be an option but i heard that it is harder to swap over the 4.0 into the cj then to just do the head swap and the fuel injection

 

[CJim7]

How many miles are on your current engine? At over 205k miles, i would be hesitant to install that (donor) motor without a rebuild.....the head however can be rebuilt cheaply and you wont have to change much physically to make it all work.

Yes. I am a proponent for the 4.0 headswap

 

[tinman]

How many miles are on your current engine? At over 205k miles, i would be hesitant to install that (donor) motor without a rebuild.....the head however can be rebuilt cheaply and you wont have to change much physically to make it all work.

Yes. I am a proponent for the 4.0 headswap

This

I just did the head swap on mine, and while not a direct bolt on, there's not a whole lot to change.

 

[cj7pimp]

yeah my plan was to try and get the entire engine for around $200 so i could have the head, manifolds, injectors, fuel rain, and harnesses and all. i would scrap the rest of the block and just use the pieces that i needed for the fuel injection and head swap.