If you pulled the clutch apart to get it unstuck, then you may not have gotten the disc centered when putting it back together. That will prevent you from getting the input shaft of the tranny back thru the disc and into the pilot bearing in the flywheel. Even with guide pins in the bolt holes in the bellhousing, it may not go in. I had issues even with guide pins and using a plastic alignment tool and had to pry on the clutch release lever to get the disc to line up when stabbing the transmission.

Craig, are you sure you meant the GM Heritage site having the FAM for the '38's available for download? I'm not familiar with that, and GM has been updating the site and even the Vehicle Information Kits weren't available to download for a while (they are now.)

Dino, If you're looking for an exploded diagram of the clutch, the 38 Vehicle Info Kit has a rudimentary one. It's on Page 50 of the PDF file. You can download it HERE

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.