440 forged crank pilot bushing hole

[440 4 speed]

Did all 440 engines 66- 70 have pilot bushing holes? Or were they only in stick cars?
Thanks?

 

[dvw]

Nope. But they do offer a roller bearing that presses into the converter pilot hole.
Doug

 

[peabodyracin]

There's a second thing to be aware of. The hole drilled may not be large enough in diameter for a bushing or deep enough to accept the nose of the trans input shaft. You may have seen 833's with the nose cut off. That's why.

 

[69Bee]

'60s forged cranks usually have them drilled, but later cast crank autos not so much.

 

[vintage chromoly]

And, if you have a drilled one but was an auto and the hole wasn’t finish honed, you can buy an undersized OD bushing.
That way you don’t have to use a roller bearing.

 

[Daves69]

Description of an auto crank and roller bearing 2/3 down the page. My '66 383 crank had only a shallow center like this ....
https://www.bigblockdart.com/techpages/4sptech.shtml

What vintage chromoly is referring to.
This 440 "auto" crank has the depth needed for an uncut trans input. However, the bore for the standard pilot bushing is under size.

 

[cryplydog]

If I had the crank out I would chuck it in a lathe and mach it. I've also used the press/hammer in bearing a couple times on the non machined cranks and when the input shaft was shortened. But. if the crank is out and you have an unmolested input shaft I would have it done at the auto machine shop if you don't have access or own a lathe.

 

[493 Mike]

I recall buying those under size bushings at NAPA back in the day.
Mike

 

[440 4 speed]

Thank you everyone, now I know what to do.

 

[oldkimmer]

The 4 speed crank has a hole bore of 3/4 inch. The auto cranks have a hole bore of 11/16. The hole is usually not quite deep enough for the input shaft. That why u may need to have the crank drilled bigger and deeper. I have a couple bushings I had made years ago I u need/want 1. The roller bearing from a 94 up v8 works in the crank register. Kim

 

[440 4 speed]

Thanks.