slant w 518, Or??

If your wanting to put an OD behind your /6 I would consider the A500 way before the A518. It's much smaller and lighter and consumes alot less power to spin it. If your running a /6 you don't need a killer trans. You need to take advantage of every last hp you have. Not waste it due to a way over engineered trans. The Keisler OD grump mentioned is even smaller yet than an A500 and would fit in easier. It's a Generic Motors trans. if you don't mind that but it's a good candidate for a swap.