Engine Swap Must Do's
a '87 360 with a '78 401
There are a
few details that need to be known when doing this type of swap.
Especially if you are like me and putting a mid-to-late '70s engine
into a late model Wagoneer.
For the most
part, it is a very easy engine swap. The 401 is the same block size
as the 360, so the bolt pattern and most parts are exactly the same.
I was able to transfer all major items (carb, manifold, pumps, etc.)
over with no problem.
But there are
a few items which hung me up in the swap that I thought everyone
should know about.
Know what the engine came from
other words, get the year, and what type of transmission it was
hooked into. In my case, the 401 was a '78 hooked to a TH400 tranny.
This is vital in determining steps #2 and #3.
If you plan
to get the engine balanced, the flexplate has to be correct. My
401's flexplate would not have hooked into my 727 tranny because
it was originally going into a TH400, so I needed to put on the
flexplate for the 727 tranny, before balancing. A safe method
would be to get the flexplate for a 74 Matador with 401 and 727
transmission (to ensure flexplate fits the 727 and is balanced
for the 401)
This was one
of the discoveries I made by chance when putting in the 401. Since
the engine was originally hooked to a TH400, the crank had a small
adapter ring for the snout of the torque converter. It is a thin
steel ring, that is pressed into the crank. Of course, the snout
on the torque converter for the 727 was too large to fit within
this ring. Make sure this ring is out before mounting the engine.
Otherwise you will end up like myself, dropping the tranny, and
chiseling out the ring with little space to maneuver.
If you have the later model Mitsubishi starter (typically
on 1988-1991 Grand Wagoneers), you will have to convert to the
older Ford starter (Try Autolite P/N A3209 at PartsAmerica online)
with fender solenoid (try Borg WarnerP/N S113 at PartsAmerica
online). These part numbers are from PartsAmerica online as of
Sep 2007 as found on a 1980 Cherokee with auto trans, or you can
look up parts for 1985 Grand Wagoneer.
- Make sure
to prime the engine before you start it for the first time (don't
- Replace the
on what modifications you make to the engine, you may need to
re-jet your carb.
about it. Just be sure to check on these items before installing
the new engine, and your swap will go buy very smoothly.