Classic *never* worked on Intel systems. And there were never install disks that could install both Intel and PPC versions of Tiger. (Leopard was the first version of the OS with a "universal" install, in the form of the first retail disk.) The only way to get Intel 10.4 is a 2006/early 2007 restore disk set as bundled with the first gen x86 Macs or as a hacked ISO off the Internet.
(If you really wanted it on an x86 board the hacked ISO's the way to go frankly. Not saying this to encourage piracy or anything, it's just that the methods to install OS X on generic hardware using a separate EFI emulator/pre-boot environment and an unmolested Mac install CD weren't really developed until later. Either way you're violating the shrink-wrap agreement.)
But, again, if you're doing this because you want "Classic" than there's no point. The only way to run MacOS 9 software on Intel, regardless of OS, is Sheepshaver, and Sheepshaver runs about as well on Linux as it does on OS X. (And Windows as well, if slightly worse than either of the previous two.)
(If you really wanted it on an x86 board the hacked ISO's the way to go frankly. Not saying this to encourage piracy or anything, it's just that the methods to install OS X on generic hardware using a separate EFI emulator/pre-boot environment and an unmolested Mac install CD weren't really developed until later. Either way you're violating the shrink-wrap agreement.)
But, again, if you're doing this because you want "Classic" than there's no point. The only way to run MacOS 9 software on Intel, regardless of OS, is Sheepshaver, and Sheepshaver runs about as well on Linux as it does on OS X. (And Windows as well, if slightly worse than either of the previous two.)