73 Dart Rear End Swap

So I've come across a bit of a set back, well not really, I just have to find another A-body 8.75 rear end. I was going to use what I thought was an 8.75 in an old Cuda, but because it was in the grass it couldn't see it was actually a little 7.25.

The plan was to put that in with my new 360, as I don't think my current 7.25 will be very happy with close to 400 Hp going to it! LOL

I think my grandpa has a housing for an A-body sitting around somewhere so I might just buy a center section, axle shafts etc... But I was wondering what kinda gears I should get, I've got a Comp 268 cam and still deciding on a converter (Probably a 2000 stall) and tire size. What combo of tires and rear gears would be good for a combination of street and strip? I was thinking 3.55s. Fast acceleration is kinda what I'm going for.

And on a side note if I did install the 360 and run it with the 7.25 rear end how long do you think It would last before it blows? What is the maximum power they are rated for? LOL