Looking at the pictures I have found I do not think it is a Hemi, the Hemis tubes are spaced evenly apart. The BB units are grouped together.
The ports are not MAX WEDGE size. As for price I go to at least one auction a week, there are a lot here in NC. Sometimes you pay to much sometimes you get a steal. In my experience I have been able to buy a lot of hard to find items ( auto parts is mostly what I look for )and tools that you would never be able to buy if the owner was still alive.
The junkier the sale generally the better. They had the fuel injection unit paired up with a factory GM intake for a 62 fuel injected Vette What are the odds of finding that under some guys tool bench ?