Sweet! Nothing can whoop a Cobra
, but just in case...
Not sure about the wheel adapter, but lightweight alum wheels (like Welds or Centerlines) preferred over steel. Get some 15's rims and choose the height of the slicks based on your rpm/gear at the finishline. Hookup will be your main problem -- if you have a live axle, you've probably got the common Cobra problem, and it'll be well worth your while to drop on a traction device like some southside bars. You don't even need the control arms themselves -- just the plates to lower the axle attach points.
High speed drag is a problem on the Cobra -- try to get a 1/8-mile race instead of a 1/4-mile.
Cheers,
-Neil.