Awesome work, looks like you are doing things right the first time and not taking short cuts.
What do you plan on doing with those engine parts? What setup are you going with? What pistons are you going to use? I didn't see you mention M54 pistons above.
I'm not sure if you already know, but you asked, a common build is to use M54B30 Crank, Pistons, Rods in a M50/M52 block.
M54 Intake Cam (Required Modification), M50/2 Exhaust.
More Info here: http://forums.bimmerforums.com/forum....php?t=1715145