This is true it was some place between Vladivostok and Kamchatka in the Sea of Okhotsk an area then claimed by the Soviets as territorial waters however it was in a not very deep(400ft I think) location shallow enough(by US Navy standards) for Navy Divers to attach the recording devices and come back and remove them and replace them every so often that was the only down side is we had to wait a few moths to able to collect the recovered data so it was not a live feed.The sub was the USS Parche a Sturgeon class SSN.Such a mission would be very unwise for a ballistic missile carrying submarine indeed unless you wanted to start WWIII pronto if it where to get spotted by the Soviet Navy spotting a US Navy attack sub on the other hand would just have really really pissed them off.
They came and went several times but on one recovery the divers could not find the devices and our satellites had seen soviet vessels in the same area as the taps meaning that the Soviets had found out about them some believe that possibility they got the info from Aldrich Ames.
By the way what kind of Ford Mustang do you own?If I had the money for a trim one I'd have a 1968 428 Cobrajet.I bet that my little project 1973 Datzun 240Z with 3.1 stroker would give you a run and my 72 with her dual SUs would put a smile on your face she sounds and looks pretty good and scoots too.