alright I re-rebuilt the carb and did everything perfectly this time but it still runs rediculously rich. I've done everything perfect this rebuild... blown it out, cleaned it, wiped it down, blown it out more, reassembled... but it still runs best with the mix screw all the way in. What is wrong?

Pg. 16 is my carb http://www.walkerproducts.com/_pdf/rochester1barrel.pdf
Now 37 (power piston rod) is connected to the throttle plate and pulls down 36 (power piston) which is attached to 28 (The metering rod) which goes down into 42 (the carb jet). That is how I understand it. Is the spring supposed to be pushing the metering rod into the jet or pulling it out?

69 Buick Special Deluxe. Intercooled Turbo Chevy 250 @ 15psi on a stock long block. It's kinda fast.