Good to see you got it running again. That car about aggravated the living daylights out of me
That's how much it smoked when I had it running, but it would go away after it warmed up. When cold and revved though it'd look like a forest fire in my backyard lol.
I pretty much checked out everything that's been mentioned so far, back when I was on rx7club still I asked about it and got pretty much the same answers lol. Let us know if the MOP fixes it, but I don't think it will, or at least I was told it wouldn't. Pretty sure it needs control rings at least. I still recommend you completely rebuild it, same as I did the guy that bought the S5 from me. You see all the problems he's having trying to avoid a rebuild