Hemi experts, help identify!

the dodges and desoto hemis arent the greatest to choose from unless u find the tall deck versions, they just dont make many parts for them and they arent very powerful but are still cool and still are hemis. the chrysler hemis are the way to go just try and stay away from the extended block versions '51-'53 or '54

What exactly consists in making it an "extended block" ? Do you mean the bellhousing cast with block or ...?
I'm not really looking for HP, more so the look, but by the same token, parts availability need be factored in.

This one has "Dodge" and "Red Ram" embossed in the valve cover.