Thank you all for your help. We now have heat in the R27!
I installed the forced air diesel heater behind the stove, there was a ton of unused space back there. The heat was ducted to a vent in the head and one just below the countertop, above the cabinet next to the fridge. As stated by others, there was an existing tap on the fuel tank that was easy to couple to. I ran semi-flexible metal line from the tank to the fuel pump/filter and on to the heater. The exhaust pipe was wrapped with insulating wrap and the stainless exhaust port mounted as high as possible, above the four drain fittings on the starboard side.
The installation had some challenges, but went smoothly. Now we can be cozy as we wait out this quarantine.
stay healthy,
Brendan