I'm hoping to do likewise
I am trying to do the same thing. I bought an old VW, bare bones trike and it was well used at one point and was also without a hint of cooling tin. That was one of the cool aspects of it! A bare motor, out in front of God and everyone!
But my Vdub motor guy said that would never work as it would get too hot when you weren't moving. Obviously it had been at one point. Now I am also looking into some sort of electric powered air flow to avoid the unsightly VW doghouse tin. When I come up with something, I will post it here. In the meantime, keep after it... the truth is out there!
Everyone wants to do the easy thing, which is what do what everyone else does! There is still originality out there. I gotta believe it!
Blessings,
Trikezilla