Cut and fold. Make it out of paper, then trace it out in aluminum. Cut the solid lines and fold the dotted lines. Here's a terrible drawing of what I mean:
Now I know Zetec's and Duratec's have different coolant tanks; or at least my tank doesn't look like that. If you think it's do-able, I have a spare coolant tank if you maybe want to try your hand at a Duratec tank.
