P.S. the Duratec engine, while fun, is also notably more unreliable than the Zetec. I would pass on this. At 77K miles, problems will happen soon. Also, it's used - you don't know its history (was it driven hard? How many problems did it have?), whereas as the only owner of your 99, you know exactly how many things happened to it.
The tradeoff for all this is a sweet sounding, quick engine. But in your case, coming from a 99 Contour, I don't think it's worth it.
