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This
is the CJ7, parked for the winter. As you can see, we got a little
snow this year(2004).
Anyway, with a little 4WD motivation, we got the Jeep out of the
snow and inside the garage.
As you can see, the old reliable 258 was inside the Jeep here.... |
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And
here, it's coming out of the CJ7. We just undid everything and tried
to remember which wires went to the important places (coil, starter,
alternator and battery!) After the swap, there are a lot of wires
under the hood that just aren't needed. After we pulled the motor,
it became really necessary to pull the front clip too, since we
had so much work to do around the frame. So we undid the fenders
and grille, and away with the front clip. We also dropped the tranny
and transfer case, mostly because the CJ was leaking some tranny
fluid. The stock motor mounts came out eventually. |
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While
this is not for the timid and non-welding Jeeper, small block motor
mounts can be built fairly easily and a whole lot cheaper than they
cost to buy. The Novak
conversions chevy motor mounts inspired ours, if you go to their
site they have a lot of information
on the small block swap, too. What we did was take an old style
chevy motor mount plate (the part that bolts to the side of the
block) and use it as a template to drill the holes in a piece of
quarter inch steel. Then a piece of 2" X 3" tube was cut
at a 45 degree angle to make the body of the motor mount. |
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We
left the motor mounts very long - they were to be trimmed afterwords,
so that they would not hit the fenders. Anyway, after the fabrication
of the motor mounts, we used a scrap chevy block as a dummy motor
and put it in the CJ7 as a mock up. The bellhousing we used was
an Advance
Adapters part, it adapts a chevy small block to a T-4 transmission.
We used a little
information from the Novak Conversions site to align and angle
the mock up. The stock CJ7 clutch linkage had to be ground down
to fit on the chevy block. We ended up with the motor about an inch
and a quarter out of center between the frame rails and the block
was tilted toward the rear a little, both for oil drainage and because
we wanted the new motor mounts above the framerails. The actual
motor mounts bolt to a pair of angle iron pieces bolted to the framerails.
Somehow we didn't snap a picture of those. |
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The
motor for the Jeep came out of a 1965 Chevy 4x4 (WHICH IS FOR SALE!!!!)
that Mike had bought. The engine was suposedly out of an "early
70's Nova". We ran the numbers after we took it out of the
truck and turns out that the engine was in a 1976 Chevy truck. When
we took it apart we found that the crank had been knife edged and
balanced. We basically took it down, and replaced all the seals.
We checked the bore and stroke, they are stock 350 (3.48 stroke
and 4.000 bore). The heads on the motor were not matching and the
rocker arm studs were half stripped, so we swapped in a set of 1.72
heads off of a 1976 Chevy 400 (And yes these were stock heads off
of a 400 in a 1976 Blazer, they can be the smaller 1.72 heads).
The heads got a port and polish job. The intake is an aluminum Holley
Contender (port matched to the heads). The carb is an Edelbrock
1405 (manual choke / 600 cfm). The clutch and pressure plate from
a 1976 chevy truck will work, but the throwout bearing is a different
size, so you have to use a jeep throwout bearing.
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The
motor and the tranny and transfer case were mated while we had them
out of the CJ, this made things a LOT easier. The whole assembly
was then slid in the Jeep and bolted in. We ran the motor Monday
March 1st, 2004.
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