putting a new motor in, need advice

[williamsboys]

So i got an I6 in my 66 now, but bought a complete turnkey rebuilt 327. seen in the pic. [IMG][/IMG]. im also planning on buying a 700r4 to put behind it. I was just wondering if anyone out there has already did this swap. do i need to move the motor mounts also do i need new mounts? what about tranny cross member, move or by new? and also what about rear ends? i haven't learned that far into my build what would be some good gears to put in, also can i make this stock rear end a posi? do i need a diff radiator, also whats a good shifter to put on the floor, its 3on the tree now but will be auto when i get the tranny. any advice or help would be greatly appreciated.