Yeah, Lone Wolf's a customized Dire Wolf. It's stats haven't been posted, yet, but are fairly easy to figure out from the text of Blood Legacy. It mounts a Gauss rifle in the left arm, three medium pulse lasers in the right, an LB-X autocannon in the right torso, and LRM racks in either torso. It also mounts a OS SRM-6 above the head, which I've always taken to mean head-mounted.
Yes, LRM-15s fit, but Phelan specifically notes that he has Swarm LRMs in his first 12 reloads. So, one could assume that he either had LRM-10s with one ton of Swarm each, or LRM-20s with two tons of Swarm a piece, but LRM-20s don't fit with the LB-X you need in the right torso, so I've always assumed -10 racks.
Also note, while Mr. Balk's custom mod, posted above, is incredible, he mounted an SRM-4 below the cockpit, not a SRM-6 above, so it's not totally correct. Still damned good work, though.
As far as all of Phelan's rides:
In Lethal Heritage, he piloted a WLF-1 Wolfhound.
In Blood Legacy, he trained with a Kit Fox W while training with Natasha and Ranna, then the Dire Wolf Lone Wolf during his Trial of Position.
In Lost Destiny he piloted a Mercury (either a -97 or -98 while fighting an Elemental), a custom Nova with LRMs, NARC, and an LBX autocannon (while fighting an Aerospace pilot), and finally Grinner, his custom Wolfhound IIC during his Trial of Bloodright and throughout Tukayyid.
He stayed in Grinner during the Red Corsair crisis (Natural Selection).
Later, during the Refusal War, he switched up to another custom Nova, which was basically a Prime that exchanged it's 12 ER Mediums for 6 medium pulse lasers (Falcon and Wolf).
During Operation Bulldog, he piloted an Executioner A [IIRC](Grave Covenant).
Finally, during the Civil War on Tharkad, he was piloting a Timber Wolf.
I also believe there's mention of him piloting something else during the Jihad/Dark Ages, but I don't recall what off the top of my head.
