Getting a Flight Physical Waiver

I'm interested in flying again after 30 years on the deck. I haven't taken
the Cat III physical as I know I'll need a waiver from the FAA because I
have a pacemaker implant. I know waivers are possible and I know what the
waiver protocol entails. It's very involved and costly. I'm willing to go
through this process if I know I have a reasonable chance of getting the
waiver. So what I'm looking for is someone who can tell me what my chances
are of getting approval. Here's the problem: From the protocol I know the
FAA wants to know, among many other things, how often the pacemaker is in
operation. In my case, it is working almost constantly. One of my Dr. says
this will kill my chances, but another Dr. says this should bode well for me
because it tell them that the pacemaker is working. This is the only part of
the protocol that I'm concerned about. So here I am, not knowing if I have a
chance or if I'm dead in the water. Any info on this will be greatly
appreciated.

BTW, I'm 63 and flew in the Air Force.

Thanks,
Ken