GM used brake fluid as their hydraulic fluid in the convertible top pumps. Nasty stuff, the Body Service Manual cautions not to get on the trunk floor or exterior paint. Many convertibles have been switched over whenever they needed servicing or repair. A bonus, tranny fluid sure looks pretty in those translucent plastic hoses.
Ames Performance is a great source for parts that are shared by most GM A body cars. Unfortunately, their shipping rates are calculated by the price of the shipment, not by size or weight of the parcel. Even though their hoses would work, I did not want all that extra hose (8" on either side) to get tangled up in the mechanics and it just would not look correct.
John