Tell me where I'm thinking wrong
I believe that if I install GRUB on drive #1; power down- unplug drive #1; plug in #2 install W7 64-bit; Power down and reconnect #1 then I can have the ability to install the 64-bit Linux onto a dedicated 64-bit drive.
There is absolutely no reason to unplug drives and theres no reason to be installing grub in some fashion as your boot OS (for a lack of terms) until in the end you're ready to install Linux since you're using an OS that already has a bootloader (NT, 2000, XP, Vista, 7).
If you want things the simplest with setup, just install Windows 7 first, then Ubuntu whereas you're telling Ubuntu to install on that 2nd disk. Unbelievably, there are options in the setup where you can tell it to do that.