Thank you all for the input.
I would not personally use WD40 on underhood rubber, but it has been suggested in other posts.
Yes, Jeff, I reviewed the weather strip thread before posting this, but was looking for specific input on using the technique on brake hoses.
I don't want to get off topic here, but these hoses are specific to a June 64 K code, looks like DSD is specific to 68-69 model years, but I will contact to get more info.
BTW, car is thoroughbred, not a daily driver. Some pics of the rear hose attached.