Another question for all of you. The engine I'm installing has heater boxes. I need to figure out the plumbing from the front of the rocker behind the front kick panels up to the defroster. My question is around heat registers, any suggestions on what to use for splitters and registers in the front kick panels? Keep in mind I don't have high expectations when it comes to heat, I owned and fixed more than a few beetles, busses and type 3s long ago. Just trying to get some basic functionality in place.