Set up for 360/380 magnum crate engine

Hey Plum, welcome aboard. :) The number of Canucks on the board is growing, and it's great to see so many of the Northern folks into the A Bodies.
As Rob mentioned, the manual valve body will probably be more of a pain than it's worth, especially if you're using the stock style shifter. Your 2500 stall converter, 3.23 gears, and the 650 carb should work well as a package on that motor.