Don't forget to get the upper alternator bracket. Since the 351W is wider, you need the bracket to center it so you can use the 289 brackets. Everything I used was 289 based except for the headers and oil pan. The front cover and water pump was off the 289 too so everything matched up. Here's the bracket you need:
http://www.mustangsunlimited.com/ite...atkey=EMUSTANG
Let me know if you need anything else!