Here is what I got to use in my 69 FB. I think this is pretty nifty and it will fit and it is tucked up under the fender and out of the way, and unlike what those post says, they do repo these 75-79 Nova overflow bottles. I have found them on ebay and on a lot of parts sites. Just do a google search for 1975-79 Chevrolet Nova radiator overflow bottle.
