T5 Swaps for Early Fords - This article from Ford Muscle webmagazine is filled with details and useful information about converting an early Ford to a T5 transmission.

British V8 ID Key to T-5 ID Tags - This chart is pretty comprehensive in covering all of the T-5s and not just those used by Ford.

TR3650 01-04 Service Manual - This PDF file download is the 2001-2004 service manual.  NOTE that the 2001-2004 TR3650 is to be filled to 3.2 quarts.

TR3650 05-10 Service Manual - This ZIP file download contains the chapters of the 2005-2010 service manual.  NOTE that the 2005-2010 TR3650 is to be filled to 3.2 quarts.

T-45 Service Manual - This PDF file download is dated October of 2000, but should cover ALL of the T-45 models.  
It will apply to MOST of the Keisler RS-600 models as well, but their shifter mechanisms and tail housings are often different.