Delco PN is, 25516915.
I don't know how it compares with the 86/87 version.
Removal and installation is pretty straight-forward but it must be 'dialed in'. It can be done with a volt meter. Basically, you just turn it until you see a specific voltage, tighten the hold-down clamp and you're done.
It's been years since I installed one but I have the service manual instructions. (somewhere...) If you still need this info, send me a PM and I'll scan and send it to you.
Or maybe someone on this board knows it off the top of their head and can easily post it.
Nick
