[redss454]

from my experience the questions you asked are good ones here is my 2 penny's worth.

want a kit that has pieces that all fit together well without a need to fabricate parts.
Most of the kits today come together with little fab work but a lot of adjustments.

Good backroad handling and bump handling with good wheel travel.
you should run a small block for the good handling and light weight on the front end. a 5 speed will give you the great feeling of being in control of the ride.
Fits a person at least 6' 3" tall.
get the extended kit it will give you room to grow.you can place the pedals and seat where you want them.
That is a close replica of the original.
they all look good when painted and decorated the correct way.(original) when you put these kits next to an original cobra the kits look 5 times better.
that is my opinion, I could be wrong.
what ever you do, have some fun with it.and when you are done it is your original car. good luck Jim