Ride height

[tkg]

I'm setting the suspension on my new toy, a 64 Chevell Malaibu Hdt. I'm trying to figure out what the new ride height should be. I think that the front end is all orginal and that the springs have settled in 50 years.
SO the question is what was the stock ride height on a new 64?? This will let me order the right drop springs and get the right stance the first time.