Need new rear end please

[65Sleeper]

Hey there, I'm pretty new here too, but I can't help but notice you don't seem to do much research about for rear ends or trannys. I assume you were unaware that the original C-4 is considered even today to be one of the strongest automatic transmission, hense it's use in many race application, the Borg Warner T-5 is a little flimsy I'll give you, you however have a T-45 your car, which has basically replaced the T-5 as fords most common work horse, and while the recommended torq rating isn't exactly staggering at a rather low 330 ftlbs. I personally know several guys who are pushing almost 400 horses through them, and as long as you know how to launch a car, and don't just dump the clutch to show off for your friends, both the tranny and the stock 8.8 have held up for almost 80k miles.
And I assume you know what they say about drag cars,
"Behind every fast Chevy is a ford 9 inch."
I'm really more of a classic ford guy, but let me bring forth the old 8 inch anyway, not the 8.8 but the "little brother" to the 9 inch, I consider this to be the second strongest rear end ford ever built, and I think it can easily hold it's own against a chevy 12 bolt (which is their strongest rear-end)
I'm not looking to flame you at all, just trying to educate
Also if you are interested in a ford 9 inch, you can find them in just about any junk yard anywhere, because they are used often in alot of fords heavy duty applications, or you can replace your 8.8 and buy a ford racing differental cover, I know it sounds like just a cosmetic part, but it does actually reinforce the structural integrity of your rear end and keep it from getting torn apart.
It's very important to find out what the 9 inch came out of if you go the junk yard route. Trucks are going to have very different rear gearing then a mustang and I don't think you'd be happy with it.
I would almost suggest going with a new rear end just so you can choose gearing yourself. (I personally would go with a 3.73 or even 3.97 set up, depending on what you have for an over drive)
Good luck and let us know how things turn out.