Differences b/w auto and manual motors?

[ThePenguinKnight]

When considering the motors put into manual vs automatic trucks, are there any differences between the motors themselves, or are the motors completely identical, with the only differences being what's bolted onto the crankshaft (flywheel/clutch/pressure plate vs driveplate/torque converter)?

Specifically, I'm curious about the 4.0 OHV, 93-94 range of motors, but it's an interesting blanket question all around. My mechanic told me that there might be a difference between the camshafts/cams, but I can't find confirmation anywhere. It's something I've wondered for a while, and visual inspection of a 93 auto vs a 94 manual doesn't reveal any obvious differences, so I'm wondering if anyone's got the scoop.

Thanks in advance

 

[holyford86]

there is a cam difference but the auto engines run just fine in the manual applications. I just swapped one in a few months ago, runs great.

 

[BONES]

I swapped a 91 auto 4.0L into my manual trans BII then blew it up and now I have a 94 manual trans 4.0L in there with the auto ECM. Runs great. As far as I can tell there's no difference between the auto and manual engines externally. Both ran the same and both ran great.

 

[pcollins]

Computer and Flywheel/Flexplate are the only difference

 

[Snoranger]

There is also a difference in the main bearings. The man trans engine has a different crank thrust bearing then the auto engine. Dont worry about the differences, I've run a manual trans behind an auto engine in multiple 4.0l trucks. My current 94 limited has at least 60k miles on that same setup.