CustomEFIs is where I got my setup, which still doesn't work very well. Not a good experience with that guy at all! The bottom line of that whole story is that he had me jumping through my butt doing stuff like running the fuel line into a bucket to get the flow rate of the pump - when all along the problem was that he sent me a throttle body with 305 injectors instead of 350. I had to figure that out myself.
https://sites.google.com/site/k5blazertbi/
https://sites.google.com/site/k5blazertbi/