Re: [AMC-list] AMC-list Digest, Vol 43, Issue 22

["Dan Strohl" <DStrohl@xxxxxxxxxxxx>]

Rick-

I've done the 4.0L swap into a 1979 AMX. My suggestions:

* Get an OBD I (1991-1995) 4.0L. I know some guys prefer the Renix, and
some don't mind the OBD II, but if you've never done something like this
before, OBD I is fairly simple.
* Get a donor Jeep that runs. That way you will have just about
everything you need - computer, sensors, wiring harness, and all. I
prefer the accessory layout of the YJ Wrangler and the ZJ Grand Cherokee
over the XJ Cherokee.
* Google "five to fire" for info on how to adapt the Jeep wiring harness
to the AMC wiring harness. Plenty of CJ guys have already blazed that
trail, so all you really have to do is follow in their footsteps.
* If you can, get a 1999-up Grand Cherokee intake manifold. Not only
does it flow better, but it provides more space in tight engine
compartments.
* Don't throw away the 258. The crankshaft and rods are in high demand
by guys who like to stroke their 4.0L sixes. If you are planning to
stroke your 4.0L (highly recommended), I'd suggest you swap it into your
Pacer first, then stroke it. It's another step, but it can get maddening
to try to separate out issues related to the stroker versus issues
related to the swap when you do both at once.
* The 4.0L will bolt up to any bellhousing the 258 bolted up to, but the
bellhousings behind 4.0L engines had a mount for the crankshaft position
sensor, which 258 bellhousings won't have. If you're using a 4.0L
bellhousing, you're good to go. If not, you'll have to figure out a way
to mount the CPS. I used an Advanced Adapters CPS relocation kit, but AA
has apparently discontinued the kit since I bought mine. HESCO may have
a kit - I haven't recently checked.

That should cover most of the bases. Feel free to email me if you have
any questions as you go along.

dan
 



Date: Tue, 30 Oct 2012 21:35:57 -0400
From: Rick Trawick <rtrawick@xxxxxxxxx>
To: farna@xxxxxxxxxxx, 	"AMC, Rambler, Nash, Jeep and family"
	<amc-list@xxxxxxxxxxxxxxxxx>
Subject: Re: [AMC-list] Met a guy very interested in my '65 (OHC six)
Message-ID:
	
<CAOUF_2iZgb53trnj+vfrbaGbb+G0Tc4NZvy2opUyjZuHL4zXJA@xxxxxxxxxxxxxx>
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Just to add to the comments...
I think GM has proven pretty well the OHC is not the magic bullet. The
small block Chevrolet V8 is still a pushrod engine and (though I don't
buy in with the Chevy folks that it is the "same" small block for all
these
years) still can be made to have great power-to-displacement ratings, be
very clean and very fuel efficient. The magic is not the location of the
cams but modern electronics. The current design of feedback-loop
electronic engine control can do things that were only dreamed of when
our six was designed. But if you look at the last iteration of the 4.0
Jeep engine that the 258 etc evolved to, the horsepower was up, torque
was up and fuel mileage was up. Yes, the head was redesigned but still
it only had 2 valves-per-cylinder and pushrods.
I think I have finally talked myself into dropping one into my Pacer.
Anybody have any info on adapting the Jeep fuel-injection harness and
computer into the 1977 AMC wiring harness?

Rick
77 Pacer wagon

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