258 EFI anyone?

[Gildo]

OK Im in the middle of some (too many) projects right now one of which is a head gasket and reco for the old CJ Hearse.
I also have an XJ project and an MJ project in various stages of dismantlement.
With the head off and the various parts lying around I get this silly idea to try fitting a 2000 4.0 intake and extractors to the rebuilt 258 head, initally planning on plugging the extra holes adding an adaptor plate and re-fitting either the carter or a holley.
OR 4.0 throttle body and running straight LPG.

Then the next silly thought takes hold and Im looking into the guts of an XJ thinking "What if I just add the rest of the EFI and make that work??"

I know the easier answer would be to plonk on a complete 4.0 head but the 258 is virtually new- valves, springs grind etc, bigger valves, hardened seats etc, about $1000 worth of rebuild, and I have that flash new cast alloy cover too.

I know I'll need a new ECU, and some sensors to add on , but what exactly and where do I get it?

[Dave XJ]

Gildo, I cannot help you with your wild ideas/questions, however I do know one thing and that is you have toooo much on your plate.

[AussieCJ7]

Gildo the 4.0L head on the the 258 is meant to be a great combo and heaps of writes around

http://www.monsterslayer.com/jeep/40Head/40Head.htm

Things to be aware of there are 2 head bolt sizes for 258 blocks 7/16" and 1/2" 4.0L is 1/2" so you need to either drill and retap or you can but centering washers for the 7/16" bolts
Water jacket ports dont line up and you need to address this via machine /plugging them

The 2000 MPI will be OBDII and will include sensors in all sorts of places such as fuel tank and runs the gauges pre 95 OBD1 system would be easier

you can buy it all as a kit in the Mopar EFI kit for 258 or take the whole 4.0L head intake etcand all the EFI

check out www.cjoffroad.com

[Gordo]

What happened to sub cj dude?? Sub did a nice EFI setup on his 258

[AussieCJ7]

Originally Posted by Gordo

What happened to sub cj dude?? Sub did a nice EFI setup on his 258

He used the mopar kit big $$ but the easiest way