Re: [AMC-list] 1978 258 in to an 85 J-10

[Ken Ames <ameskg@xxxxxxxxx>]

Apparently spline count, diameter, and length are the same for the SR4 and T176
that are connected to the 2 engines. I left the manifolds attached to the
exhaust in the truck while I'm pulling the engine - it seems easier than trying
to unhook the exhaust from the manifold. The 78 engine would have fit with it's
rear sump but the engine in the truck is centre sump and the exhaust pipe passes
right where the rear sump would be so I guess I'll be swapping pans and
pick-ups, after a good cleaning. There was hardly any coolant in the radiator
and the oil pan is really full so it looks like I have holed the water jackets
inside.


Ken

Quoting Jim Blair <carnuck@xxxxxxxxxxx>:

> 
> The exhaust outlet angle should be the same, but it's not a problem in the
> truck. Later intake exhaust flows better than pre '81. Since you have a
> stick, the crank pilot isn't an issue unless the pilot is a different
> diameter (5 speeds sometimes go a little deeper in) Do a spline count too. If
> you had an auto, you would have to worry about the TH400 sleeve in the crank.
> Button that to a Mopar style trans without removing the speedi-sleeve
> thickness insert and kiss your trans front pump goodbye and the trans too
> from busted bits that will flow around the second you start up.
> 
> Jim Blair, Lynnwood, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10
> 
> (ameskg@xxxxxxxxx) wrote: Any reason why an August 1978 258 won't fit in to
> an 85 J-10?<br /><br />The 258 in the 85 broke yesterday while I was hauling
> the 78 258 to storage. It appears to be a drop-in to put the 78 in the truck.
> Both are manual trans engines. One question I have is the exit angle for the
> exhaust. Are they the same for the 2 different exhausts? Or would it be
> easier to leave the manifold(s) in place in the truck and bolt them to the
> earlier engine once it's in? <br /><br />The 78 was being used in an Eagle
> using the specail differential bracket that goes back to the bell housing
> rather than up to the block. Hopefully the clutches are compatible and I
> won't have to swap them.</span><br>
>  		 	   		  


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