heater boxes

[oasis]

Hi,

As I put together what I want for specs on my future GL, I have question regarding heat in a 1303. (I intend to drive it when temps get below 32°F/0°C.)

My original plans are a 2270 with a BAS exhaust.

Should I go with:
(a) heater boxes,
(b) a current Eberspacher heating system,
(c) a vintage Eberspacher heating system, or
(d) a plan different than my original?

With (a), I'm not sure of my options with a BAS system. I know (b) will be pricey, but that would be okay within a certain amount of reason as long as a current model can be easily fitted. I'm leary of (c) due to shopping for a reliable unit from a reliable person.

Thanks,
René