If you want to install a Tri-power and you do not have the recess in the timing cover that is required for the water neck to clear this water neck is a good alternative. This water neck is custom made out of aluminum. It is slimmer that the cast iron 1966 water I have on the web page for $47.00. Has same profile as the cast iron water neck. The hose end points toward the drivers side and accepts the stock 1.5" radiator hose.
This water neck is also a good match being aluminum if you are going to use a 1966 aluminum intake or the Trade Wind intake and leave natural.