I went to my old work (a Chevy dealership) and asked the guys to print me out some data on the T56. I thought i'd pass on the information, since a lot of guys seem to have the same question i did!
I have not yet put the T-56 in, but i figured if i had the same questions, i could certainly save a bunch of people the hassle of finding this out on their own.
This is free on many sites. Don't pay for it at the dealer, eBay, or any of the rebuilders. The manufacturer even has it available for free on their site.
Randy
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1995 Impala SS
T56 Six Speed, Wilwoods, Tri-y's,...
1964 Riviera
31k miles