Just a couple of updates here. I took the M370 off for a dyno run and then put it back, and in the meantime figured out a few better ways to deal with the various hoses:
1) Swap the screw-in fittings they ship on the can, so that the straight one's on top and the angled one is on the side, facing up. Makes for much shorter and neater hoses:
2) (This is more M370-specific than catch-can specific): Use the lower rear vacuum port on the M370 for the PCV intake (directly), and tee-adapter the MAP sensor to the brake booster going into the upper rear vacuum port.