The picture's shown above are just like our 66 413 truck engine. As stated the water pump is high on the engine. The orange pump in your picture is typical car/pickup style and would not have run that way. I would say the distributor was also "Added" to this deal. These engines usually have a much larger distributor and governor setup. The exhaust manifolds are the same as our truck (CT800) and are unique to these heads. I would add one more thing... As stated the cranks are very heavy duty and I believe the rear flange may hang out the rear farther than typical RB car type cranks.

These 413 engines will handle "full throttle loaded work" all day long. But they only run 2500-3000 RPM max.