It depends what is the wanted manufacture year of the Chevrolet Camaro z28. If one wants to buy the newest, soon to be released, 2014 Camaro z28, the base cost will be most likely 60 000 $. The cost will increase, depending on what accessories one will choose.
The ONLY transmission that came in the 1991 350 Z28 was a four speed Automatic 700R4. IF it has a manual it was added by someone.
The HO engine had higher compression, bigger intake valves, and a different cam. Also, it was painted black.
It is the ignition wire. The purple wire goes to the small stud on starter.