Depends on what you were setup to begin with...

Got this information from a post by Hellraiser79...

A TH350 short tail and a 2004 R are the same length from the bellhousing to the end of the shaft. So the driveshaft (27 spline) will work with either. The difference lies in the fact that the cross member for the 2004R needs to be back 6 5/8" further than it would be for a TH-350. A 700 R4 also uses a 27 spline driveshaft but it would need to be 3 inches shorter than one for a th350 or 2004R. The 700 R4 cross member needs to be 2 1/8" further back than it would be for a th350. Th200-4r also have a .67 to 1 overdrive ratio whereas a 700 R4 has .70 to 1. The 700 R4 has a 3.06 to 1 first gear compared to 2.74 for the 2004R.






More Information at http://tciauto.com/Products/TechInfo/trans_dims.asp