I have a similar setup as you but probably a smaller battery. Mine currently has a group 24 batt and also a noco gb40 for backup. If you set the fridge to medium protection your rig will start just fine without the help of the noco. There are problems with voltage drop over 15ft so obviously...
Sweet project. These cars are basically worthless, but have such an awesome (when working) powerplant. I just did a countrywide search on manual allroads on CL, and came across exactly one.
