I don't know what I'm doing? I HAVE FIREWIRE!!!
I was reading your build specs in your signature. Also, the fact that you did not read any of the previous three pages, made me think you were using a different motherboard.
The firewire in question is VIA VT6308P (which I assume is using the Texas Instruments chip), as it has always worked OOTB for me. Apple dropped support for all firewire devices that didn't use the TI chip in Snow Leopard+.
PS. Sorry for the outburst LK - It is like asking a Porsche expert to fix your Ferrari.
If you read any of the previous 3 pages, you would understand I am using a NON-UEFI, NON-DSDT, Chimera and MultiBe*st based install. I have done this same method of install on three or four recent machines, including a laptop (which DID require a DSDT made for it). This is the only type of install I know how to do, and it works consistently.
If you refuse to use one of my MAIN TOOLS, that installed the 10.8.1 ACPIPlatform kext rollback, which (possibly) allows firewire to work (and you could copy over to your EFI/Clover partition) -- then I cannot help you. I have never been able to get Clover working on this motherboard (black screen). I never got Firewire400 hot-plugging to work on MacOS9.2.2 or 10.5.8 on real Apple hardware (original G4 iMac).
THAT BEING SAID, someone else without Firewire on 2600k, P67A-GD55 (B3), got a custom DSDT made by MaLd0n here -> http://www.insanelym...21#entry1714561
It might come in handy :-)
EDIT: found on SL forum -> Delete HPET driver in extensions. HPET steals FW IRQ <---DON'T DO THIS Lord Kamina!!!
EDIT: There is a HPET and IRQ fix in DSDT patchers. Boot with -v and watch for the firewire/1394a info.
Cheers and best of luck.