Seafoam, no smoke?
 

I seafoamed my '95 Ti with 190k miles on, and thought for sure it would smoke like crazy, but I only had a tiny bit while sucking it in through the line on the back of the manifold. Waited a little over 30 minutes started it again, and no smoke show at all. Did I do something wrong?

I've never used Seafoam, but that is strange that there was no smoke. I have no idea why.

You may have waited a little too long to start it back up. Perhaps the seafoam evaporated or dried up in the intake manifold.