700R4 swap

[Guff]

What parts do I need to swap a 700R4 transmission in place of a 69 TH350 on a 69 small block? As I understand it, the 700R4 will bolt in place of the th350 and use the same yoke, I just may need to move the crossmember a little. I guess the 700R4 is only 1/16 or 1/8 inch longer than a th350 with a long tailshaft, so I won't need a different drive shaft? Do I need different shifter linkage? What years had the mechanical speedometer cable? I've been told 700r4's from 4x4's are stronger than other 700r4's but they are the same dimensions, is that true? Should I only look for fullsize truck transmissions or are camaro/firebird/s10 tranmissions ok too? How much should I expect to pay for a working 700r4? I know that's a lot of questions, but it seems like a lot of people do this swap, I just wonder how difficult it is.