Nice project
Look here for my original layout.
http://www.mr-atari.com/myide.htmThe chips will do fine I guess. I had best results with 74LS245 74F32 and 74F04.
If you have timing problems, you can add the fix in the stability thread (small delay on A0-A2).
Perhaps a 3.5"-2.5" adapter is a good item. They are really cheap on ebay.
It has a PC-power plug (+5 and ground) that you can wire to your board.
Later,
Sijmen.