Which Arp 454-150x For Fox Body?

50resto sells a waterpump/timing cover kit specifically made for foxbodys. Make sure you use the 6% discount code that you can find on corral forums. The arp kit from summit racing won't work.

Check out Totally Stainless ( http://shop.totallystainless.com/ ) for the stainless steel water pump studs...

1986-1993 MUSTANG WITH (2) SHORT & (1) LONG STUD BOLT 6-9029 $48.89
They will also have the stainless steel water pump bolts

Here's some help on the bolt lengths...
Copied from Noobz347

Water pump bolt sizes
*All bolts are 5/16"-18

Water pump:
4 bolts - 3 1/4"
2 bolts - 4 1/4"
2 bolts - 1 1/4"
1 bolt - 2 1/4"

Additional timing cover bolts:
2 bolts - 2 1/4"
2 bolts - 2 1/2"

Take a cardboard box, & turn it upside down. Count the number of bolts that hold the water pump on, don’t forget to count the 4 funny looking studs too. Poke a hole in the box for each bolt/stud. Arrange the holes in a circular formation, and mark the box at the 12:00 point. When you remove a water pump bolt, put it in one of the holes in the box according to where it came out of the water pump. When you are done, all bolts will be arranged it the exact same order and position that you removed them from the water pump. That makes re-installing them easy, no wondering where does this bolt go.

Use lots of antiseize on the bolts to protect them from corrosion and make them easier to remove next time.