Not a 383

My nephew just bought a 66 Dodge Coronet 4-door with what we thought was a 383 but after some research on the car turns out its a 361.My question is is that a big block ? The distributor is in the front which leads me to believe it is a b/b.Also is it considered a rare engine because i've never heard of a 361. The car is all original and only has 20178.7 miles on it and you can tell.Any help would be greatly appreciated,and since its not a 383 he wants to sell it for what he paid ($4500)THANKS ALOT