I'm still plotting a heat scheme. I really want to have heat/defrosters in my 3.6 conversion. I've entertained the idea of a gas heater, which would probably work fine. I've also considered trying to get something to work off of the oil cooler. Now, I was just looking at the Elephant racing finned oil lines and thought hey, maybe I could route finned oil lines through the old heater passages (solves oil line routing to front cooler) and still fan force air through the passages and derive heat from the finned lines. I would have to come up with a way to port the lines into the ducts and out while still keeping the ducts semi-sealed. This doesn't seem insurmountable.

For all you thermodynamists out there, would this work for heat??