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What engine do I have?! 73 F-100

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Old 06-12-2011, 12:46 AM
boosalmi boosalmi is offline
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What engine do I have?! 73 F-100

Hey Guys,
First time poster. I just bought a 73 Ford F-100 4x4 today and I am stoked about it! My father had a 79 Ranger when I was a kid, and I've always wanted one just like it. Well, today I bought it. I got a great deal, needs alot of work, but I love it non-the-less.
The gentleman that sold me the truck told me it had a 390 in it with an automatic transmission. He told me flat out he did not know much about the truck. But, someone really loved this truck recently and put alot of money into it.

So, here is the question... according to the VIN the truck has a 360 in it.
How do I find out if its a 390 or a 360? I'm pretty mechanically savy, and the engine looks pretty big to me.
Second, the truck is an Automatic, but the hurst gear shift is on the floor, not on the tree which my pops nor I have ever seen... It also doesn't have any automatic "Drive" indicator on the dash or anywhere else. I'm assuming that the engine and the trans are replacements. How do I figure out what engine and trans I have?

Thanks so much for the help in advance. This is a great forum.
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Old 06-12-2011, 01:57 AM
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1976HighBoy 1976HighBoy is offline
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360 has a 3.50" stroke, 390 has 3.75" stroke. Pull a sparkplug and use a small straight wooden dowel or stiff wire. Manually have someone turn your crank pulley as you note the top and bottom of your measuring stick of choice. Measure the total distance your dowell moved up and down. If you end up with a 3.48" stroke 352, or a 3.98" stroke 428. Most likely you have a 360, or if your lucky a 390. There are many ways to check this, but all take a little work and research. This subject has been covered a ton of times,- GOOD LUCK
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Old 06-12-2011, 03:04 AM
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Welcome to FTE.

https://www.ford-trucks.com/forums/1...hem-apart.html
There ya go.

To ID it as an FE just look to see if the intake goes under the valve cover. Or count the valve cover bolts, FEs have 5.
Congrats on the new truck btw.
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Old 06-12-2011, 03:15 AM
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also the floor shifter is definitely aftermarket, and the gear indicator was on the column in these trucks in stead of the dash. sounds like somebody probably swapped in a manual tranny column.
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Old 06-12-2011, 08:31 AM
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1968/76 F100/250: The only V8 offered with 4WD was the 360 2V. VIN engine code Y (4th digit).

On sale day, 360 engines magically become 390's.

The A/T shift lever dial is mounted on the upper flange of the steering column.

1968/76 360/390 have the same bore (4.05"), the stroke is different: 360: 3.50" / 390 = 3.78"

352 installed in 1965/67 F100/350's only. The bore is 4.00" / The stroke is the same as a 360.

No FE engine has a stroke of 3.48" / 332 installed in 1958/59 Ford Passenger Cars has a 3.30" stroke / 406/427 stroke is the same as a 390 / 410/428 stroke is 3.98"
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Old 06-21-2011, 05:48 PM
boosalmi boosalmi is offline
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Well, a quick update. The truck runs good but is quite the dog when running down the road... I expected this from a truck of this size and weight. After playing with it for a while I decided that the points, and all the tuneup stuff included with the truck, were included with the truck for a reason. I took the dizzy apart but chickened out and decided to have a shop do it for $70. (I want my truck to run alot better, not be muffed up due to my inexperience. Lol. I will learn how to work on it more by myself later. ) I took the truck in and they worked on it... Told me that it runs ok, but my power and gas mileage are in the toilet because the distributor is shot and "rocks" affectively changing the points gap all the time. The mechanic (who owns a nice 74) told me that I should put an electronic ignition in it and never worry about it not running on all cylinders again. He told me this would drastically affect my horsepower and give me a couple mpg more. I cried a little when he told me how much, but I told him to do it anyways.
Please tell me he is right?!

Oh, on another note. He told me he is 100% sure my truck is a remanufactured 390 and it's a very great engine. Again, he said this should respectively fix all the "lacking" I have with it.

Should be done tomorrow.
Thanks guys!
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