First, a question.
How many rifles have you built to date?
If this is only your second…….. go with the Kibler.
Second, a Lehigh with a straight octagon barrel will be unwieldy. Should be swamped.
Thirdly, a Lehigh is one of the most difficult to pull off. They are a peculiar style (which I love), but very difficult to do right. Not a straight line anywhere.
If not done right, a real cheek slapper.
I’ve built a dozen or so, from a plank, and still learning the nuances.
A Kibler will give you a great opportunity to have a well designed, proper Southern gun, with minimal effort. Hard to screw it up.
Hope this helps.