If the old PC is dead, then I think you mean that you would install the drive with siduction on the new PC, right? In that case I think devil has misunderstood the situation -- it could work.
If the new PC has UEFI, that's a big challenge. I think you would need to set that to "legacy" mode, if possible. If you can get the machine to a configuration where it will boot either hdd A or hdd B, then you might want to leave it that way and use the BIOS boot sequence to choose which OS you want to boot. Or, you could try to re-install grub on the mbr of the hdd with siduction on it, and let os-prober add the Windows drive to the boot menu. I have not tried this trick with a UEFI system, so I don't know whether or how that is possible.