ARTIC,
This particular Cobra wasn't bought from a guy in Ohio was it? Black in color?
I honestly don't think you have to jack up the motor. Long time since I've done one. If memory severs me you can loosen the rear bolts, but you will have to pull them with the head.
I'm surprised you aren't finding anti-freeze in the
oil.
Raising the motor is not a problem though if you think it will help. Pull the horizontal bolt, jack up the drivers side and it will swing quite aways before anything starts to bind.
DV..will be watching your progress