Driveshaft Measurements for a 200-4R

[s2hooey]

I recently purchased an 2004-R from Art Carr (the one in California) to install on my 1966 c10 which is running a mild 350 engine. He told me over the phone I would have to shorten the driveshaft. I am currently running a TH350 with a 9 inch tailshaft (blew out Thanksgiving Day). From what I have read on the forums this should be a direct bolt up so I submit to you the following questions:

1) Has anyone done this swap and know if it will need to be shortened?
2) If it does need to be shortened, does anyone know the measurements (trying to make this as easy as possible without any installation hickups)?