With the ENDTB 865 on the B 615 going from the Thermodyne 864, the dog house was customized, as the years go on since the install in the mid 90's maintainence and access to the rear of the motor, that firewall was taken off. There is a main leaf on the rear that needs to be replaced so untill that happens she won't be going on the road regular. The thought to keep the exaust pressure equal was what led to cutting the fire wall. keeps you warm in the winter and is like a sauna in the summer. I happened to look at the clearance in the twin spin on filter and steering box there is maybe .5 ", when the oil was changed, the filters wern't banged up from hitting the steering box, so they are working in this one. This truck body was never designed for 865, a longer nose on her, and set the engine ahead 1/2 a foot and the motor would fit. As it is she is running smooth, Just replaced the water pump, pulling the fenders and radiator is dam near nascar speed, really opens up the work area, To check what the problem was of oil in the water, the pan was dropped and pressurized the water system, there it was flowing down the front cover. Glad it wasn't linner seals, looking around, don't know how but the pick up tube was unbolted and one oil cooler tubes was missing on number 4, they are still available and have one getting shipped, any info on installing that would be great. I would kinda like to keep her all original but, I hope to look into a oil driven steering box maybe mount on the outside of the frame. similar to a 359.