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Old 12-29-2009, 01:34 PM
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late model 302 into a 78 mustang

my ride is an original 78 cobra with a 302. i want to put a new motor in the car and i found one. it is out of a 89 lincoln. i know the motor will fit but they are selling the transmission with it. the seller is stating that the trans is a non electric aod. first question is, is this true and what modifications do i need to do to make it fit. will take all the input i can get.

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Old 12-29-2009, 02:43 PM
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I have a 77 Mustang II 302 auto but its the factory 302 with c-4 trans as far as the AOD I also have a 1953 Ford with a 302 EFI and AOD and it is non elec so i would say the one you are looking at is probably not either i can't be of much help with the install i know the II's had a smaller bellhousing so im not sure what kind of fitment issues you might have.Good luck
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Old 12-29-2009, 03:28 PM
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If this is indeed the mechanical vs the EAOD, it is NOT a direct fit into the '78 Mustang. While not an insurmountable mod, you will have to at a minimum, shorten the drive shaft and modify the transmission mount. These are easy. What MAY be a problem - either AOD transmission may be too big to fit in the C4 transmission tunnel confines. Now, there are other problems - especially if you want to bolt the original '78 transmission on the back of the '89 motor. They fit - BUT, and there is always that BUT- you will need to consider the fact that the '78 motor was balanced to 28 in oz vs the 50 in oz of the '89. Now you are into a different flex plate and torque converter. Another, the '89 is an EFI motor - so you have an electric fuel pump and either have to completely change over the front timing housing/water pump/serp belt system to the '78 V belt version and mechanical fuel pump or add an in-line electric fuel pump. Also you need to plug the '89 oil dipstick tube hole, change to a front sump pan, oil pump and pick up. Next, you need a fuel pump eccentric on the '89 camshaft. Then the intake and carb.......

These are the "easy" changes that I thought of while typing this

Now, with that said - having fun yet

Dave W
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Old 12-29-2009, 11:14 PM
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Here I am to the rescue!!

Here you go step by step and in pictures too,just click on this: your later engine has a 50oz balance and so does the matching AOD flexplate so no swapping from your earlier Mustang there.You might have to shorten your driveline,but you won't know till you install it,the later Mustangs and Lincoln MK's had a shorter tailshaft than the full size cars but use the same front yoke.Like the above post states you will swap the oil pan,pickup,dipstick and timing cover and timing chain and eccentric and fuel pump to the new motor presuming you will use your Carb intake,just remember you have to keep the late model harmonic balancer.You cannot use the late model water pump either since it is reverse flow.

Last edited by JeffB; 12-29-2009 at 11:27 PM.
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Old 12-30-2009, 03:38 AM
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Here is an older article about putting an AOD into a Mustang II
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Old 12-30-2009, 09:13 AM
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Maverick/Comet Forum

The issues you'll face with the late model 302 and AOD in the Mustang II are much the same as in the same swaps in a Maverick or Comet. (I'm putting an '88 302 HO in my '72 Maverick.) The Maverick/Comet Forum has "Tech Articles" on both the roller 302 and AOD swaps. See

One thing to watch out for is the width of the fuel pump eccentric. If you're using a carburetor and a mechanical fuel pump, you'll have to use the front cover from your early 302. But when the eccentric is installed on the roller cam, it will contact the front cover. There are a few ways to deal with the issue which are outlined in replies to the Tech Article on the late model 302 swap. The early 302 used a one-piece eccentric. The pre-EFI (e.g., '85) roller 302 used a thinner two-piece eccentric that is no longer available from Ford. You can mill .100" off the one-piece. I found the thinner 2-piece on ebay. If you post in the classified section of some of the Ford forums, e.g. the Maverick/Comet Forum, someone might have a 2-piece. Have fun. The roller 302 and AOD will be great in your MII. They say a 3.55 rear works well with the OD transmision.
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