not sure if this is the one
The Maine Road regime always seemed to aim for the stars and end up hitting the ceiling when it came to improving the Kippax - in 1971 Director Eric Alexander outlined his further plans for the Kippax “If we could rebuild part of the stand, incorporating a second tier containing about 8,000 seats, and build into the back of the stand a multi-storey car park spectators could then drive their cars straight into the car park and reach their seats without ever going outside. And private boxes would be incorporated in the back of the stand”