Yes a 2366 has the 8.3L. From your posts I take it you are looking to buy it? Better check on the model year! When production was moved to Grand Island the 66 was replaced with the 77, pretty sure that was in '05. Definetly has a mechanical pump. Last year of production would be '04. Someone correct me if I'm wrong.
Your right hydro100. Last year of production for the 2366 was 2004 model out of Moline so the one you are looking at can't be newer than that 9520deere.
2377 started in 2005 out of Grand Island and was electronic fuel control.