bmans,
It is a model # 3005 for C3 Corvettes 1968 - 1982
http://www.hydratechbraking.com/C3Corvette.html
Sean the other member who was buying it is confused, his Corvette already has power brakes, it's of no use to him so its still for sale if you interested.
I will sell it for $375 with shipping included.
Thanks
Dave McKenney