Early vs Late engine differences

[Refit1701]

Is there a list of features for early vs late engine types. I have several engines here and wanted to pick the best one to go in the 62 Ford. I know that the best one is one that runs but what are the features of the types?

[rickf]

Are you looking for historical accuracy or just best of all the parts? The internals of all of the years are the same. The late model "heavy duty" head is the only major engine part that is different as far as engine parts. It has hardened valve seats and larger cast bosses where the bolts for the manifolds go in. It also accepts gaskets where the early heads were designed for a very snug fit and the "gasket" was Moly grease. Other than that the early had a vacuum pump instead of a fuel pump which is interchangeable. With the vacuum pump came the electric in tank fuel pump and there was a oil pump safety switch plumbed into the oil circuit opposite the oil pressure switch on the oil filter adapter. The early had a 25 amp alternator with 2 belts and the late had a 60 amp with three belts. The pulleys and generator bracket are different but all easily interchangeable. The very early, as in your 62, had a Holley carburetor. I have some of these if you need one. And the early up to around 63-64 I think used a bell housing with a removeable plate over the starter drive for a manual linkage to operate the drive in arctic temps when the drive would freeze.
Ken may jump in and fine tune this if I missed anything.

[Surveyor]

Rick beat me to it but here are a few more...

1) Front top radiator mount has an eye to help with engine removal.
2) Front engine mounts were different with an extra brace in the middle.
3) Some (early) M151 engines had SN numbers cast into engine.
4) Timing pointer was part of cover.

Here is one currently on craigslist near Pittsburgh where you can see the early engine and radiator mount. You can barely see the thinner head bosses as well.

[Refit1701]

Interesting! I wasn't talking about parts being better, etc., but the early features. I'll look at mine and see if any have those things.

[Mr. Recovery]

Here's a photo of the early bell housing with the actuator installed.

DSCF0159 starter assist.JPG

dan-2beers.jpg

[Surveyor]

Just a cover over mine. How was it intended to be operated? (Not that I would ever need one down here!)

[Mr. Recovery]

It was operated by a pull cable like the choke and throttle.

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Here's some close ups I just took.

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[rickf]

There has to be more linkage inside the bell housing to change the down motion to linear motion. The function of that piece is to engage the bendix manually when everything is frozen so it has to push it in towards the flywheel. I never knew it was cable operated, I always thought it was a handle of some sort.

[Refit1701]

I have three engines here, some with different features. I'm not going to mix-n-match parts at the moment but I want to gather the early types for a later engine rebuild. The good running engine I have is from an A1 but it's not the original engine for that jeep. The A1's engine has not been recovered yet since it's buried at the sellers garage.

I do have an early timing cover.

Early boss?

Boss Type 1.jpg

Late boss?

Boss Type 2.jpg

Late Mount?

Mount type 1.jpg

Early Mount?

Mount Type 2.jpg

[Mr. Recovery]

There has to be more linkage inside the bell housing to change the down motion to linear motion. The function of that piece is to engage the bendix manually when everything is frozen so it has to push it in towards the flywheel. I never knew it was cable operated, I always thought it was a handle of some sort.

Well from what I remember, it just holds the starter bendix engaged into the flywheel ring gear, it just keeps it from jumping out, it is a round plunger that goes straight down

dan-2beers.jpg

[Surveyor]

Refit - all the picture guesses are correct.

[Refit1701]

I did find that the original transmission for my project has an early bellhousing. Not sure about the transmission itself. Good thing it is in excellent condition! LOL

I still need the early push button brake handle.

transmission early.JPG

[rickf]

I have seen worse tranny's than that run just fine after a little cleanup. As long as the bearings did not rust the gears will clean up. The bearings tend to trap oil so they hold off rust a lot longer. Fill it with E85 gasoline and flush out all of the oil a couple of times and then let it dry for a week or so with the top off and the transfer side cover off to get some circulation. Then fill it with Evaporust or similar and let that work for a week. But you have to be sure all the oil is out, that is why I suggest the E85 since it is mostly alcohol and it is a strong solvent and will dry quickly. As long as there is no oil the Evaporust will work well and it is reusable for other projects.

[Refit1701]

I'll get started on it. I have plenty of Evaporust. Thanks.

I have seen worse tranny's than that run just fine after a little cleanup. As long as the bearings did not rust the gears will clean up. The bearings tend to trap oil so they hold off rust a lot longer. Fill it with E85 gasoline and flush out all of the oil a couple of times and then let it dry for a week or so with the top off and the transfer side cover off to get some circulation. Then fill it with Evaporust or similar and let that work for a week. But you have to be sure all the oil is out, that is why I suggest the E85 since it is mostly alcohol and it is a strong solvent and will dry quickly. As long as there is no oil the Evaporust will work well and it is reusable for other projects.

[Refit1701]

The bellhousing is early, what about the transmission? This ones getting rehabbed with the RickF method.

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