hello people; I do have the OEM 86 Buick manual and it covers alot more than the Regal. I tried to separate the Regal stuff but it's getting old and I still think it's a pain to find stuff. I took a look at the disk and that's the same. But as with my MC's I have I would get the factory one, Clymer and one more but I forget the name. It's funny you would find some things better from one to the other.
IBBY