Adding to the knowledge for this swap. The breather tube from the ford 8.8 occupies exactly where the Toyota pan hard and spring perch are located when transferred over and welded. The hole has to be welded up. And you still need a breather! If your axle can't breathe when the oil expands and contracts, you'll blow seals out. To remedy this you will need a 25/64ths or a 10mm high speed steel drill bit. 25/64ths is 89.7% accurate for the thread tap size. While a 10mm drill bit is 90.3% accurate. Now, when I use the term "accurate" I don't mean "correct". The difference here is basically how close that drill bit size is to the actually 7/16" hole. So a 100% accurate drill bit would be the full 7/16" and therefore would not have any threads on it. Obviously we need a hole that is ever so slightly smaller than the threads so the tap will form the threads out to 7/16". The breather tube is a 7/16-20 thread diameter and pitch (20 threads is fine thread) so a tap of that size works. You will also need a way of preventing too many metal shavings from falling into the axle. I picked the end of the passenger side for the breather since it allowed the most room for a drill, allowed room for the breather, and made it easy to stuff a rag into the axle tube and catch shavings. I recommend a narrow vacuum hose to suck out remaining shavings located inside the axle tube. Once drilled and tapped, make sure you run a rubber hose over the breather fitting and connect it up high on the chassis with ample slack for suspension movement (not that my Celica has much of that) any questions???
Oh, and yes, the easy answer is just drill a hole large enough to stuff the breather tube into and Weld it on permanently. But where's the fun in that?
