I don't think there is a 700R4 with a BOP compatible bolt pattern. The 2004R has a universal bolt pattern (most do anyway).

There is a company called A&A Auto in Independence, MO that sells rebuilt "Pro-Street" 2004R's complete with shift kit, dip stick, and TV cable for $550.00. Their gear ratios are 2.74, 1.57, 1.00 and 0.67. Their phone is 816-461-3234 and email at armerl@mindspring.com.

TV cables are throttle position sensors that look kind of like kickdown linkages.

I decided to go with the TH350 because I got one for well, uh, free.