Bothered to take a random look at the Wikipedia article on the K5 Blazer and noticed it states pretty clearly that the TH400 was a factory setup in K5 Blazers. If you follow what it says strictly(looking at the years it gives) the 400 was the only option for a few years(this I know is bull****). But was a TH400 available in a K5 outside of the M1009? I know there is misinformation in this article, so just curious. I already edited the article once. The part where it talks about the introduction year of TBI. It previouslly said 1986, I edited it to 1987.