258 EFI upgrade & YJ spring upgrade - JeepForum.com
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post #1 of 3 Old 04-07-2005, 08:03 PM Thread Starter
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Join Date: Feb 2005
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258 EFI upgrade & YJ spring upgrade

guys, I am buying a 4.0 head, EFI, and wiring ($450!) to put on my 258 I am rebuilding. I want to make sure that I get everything, I have searched the forum and have a short list:

Valve head
EFI system
Exhaust manifold
wiring harness
valve cover

Anything else to pick up?

Also picking up a set of YJ spring holders to do the YJ spring conversion ( I will buy the 2.5" lift YJ spring set). Is there any other parts for this I need?

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post #2 of 3 Old 04-08-2005, 12:24 AM
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1986 CJ7 
Join Date: Aug 2004
Posts: 4,709
I'd suggest that you google the head swap as well as check out the 4.0 swap forum at http://www.cjoffroad.com

For the spring swap, the rears are a direct fit. Up front you just need conversion shackles (Rubicon Express or Ebay) and u-bolt plates.
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post #3 of 3 Old 04-08-2005, 07:02 AM
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1984 CJ7 
Join Date: Aug 2002
Location: Downingtown, PA
Posts: 2,898
What year is your 258 block? If it's not a 1980 or a 1986 up, you'll need to get the block tapped and threaded for 1/2" headbolts or you'll need spacers for your 7/16" stock bolts. You can get new 1/2" headbolts at www.headbolts.com

I used to own two CJ's...Perhaps a 3rd is in the future?
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