Splais:
My personal preference is the DA. Seems to have a bit more power than the BME. And I was going to say/ask the same thing, it's going to be tight in the cowl. I would assume that the DA would be a better choice because of it's rear fed carb. The BME has the side mounted carb and you'd have to cut the cowl to shreds.
No wonder we won the war hands down, they where hovering in the clouds all along!

We Americans are sneeky that way....