TH700R4 into a 1977 K5 (need help)

[Sander]

Here is the plan. I have a 1977 K5 Blazer and a 1988 K5 Blazer that will be scapped. The TH350 in the 77 is bust. I want to put the TH700R4 of the 1988 in along with axels and driveshafts.
Now I heard the 88's computer controlls the lockup convertor. True?
I saw on http://www.bowtieoverdrives.com that I need some extra stuff. Now they don't respond to my email. But do I need the internal wire kit and the spring kit?

Thanks in advance.