find a rearend
 

Anyone know where and how much I can get a new/used 8.8" rearend for a 1994 mustang. I plan to put 3.73's in them.

8.8 rears
 

Ford Racing sells brand new 8.8 rears for about $800. Comes with your choice of gear ratios, up to 4.30, I believe.

Otherwise, the junkyard is the place for used 8.8 rears. There should be plenty available for a few hundred or so as most collisions are front-end and rears aren't damaged.

Call around.