I guess before this goes further let's think about the fact that the cut required on the Lakewood is on the bottom flange which is bolted to a flimsy block plate that ain't containing anything. However this portion of the housing is protecting... asphalt. Not to mention there's a nice big hole for the clutch fork aimed in the direction of the driver's family jewels...
I have my doubts there are many Cobra's here running engines remotely close to powerfull enough to blow a flywheel.
I think either will be fine and you can skip indexing if you don't mind wrecking your clutch.
"That's all I got to say about that." - Gump