Marcel,
Hot Rod and Super Chevy magazines had some great articles on turbo 700-R4s and 200-4Rs a few years ago. They were very specific about the lock-up converter and TV cable adjustments.
You might contact LOKAR at
http://www.lokarmotorsports.com/products.html They are very good at helping you solve problems like yours. Their products aren't cheap, but they're very good.....from my experience, that is.
