Sounds like what mine did, kinda..
I replaced the intake manifod/valve cover gaskets, blah blah, you know the rest cause you posted in that thread.. anyways, I timed it (the first time) with the light and got it on the mark, idled/reved fine, but ran like crap low RPM... needed 3/4 of the pedal to make it go. So I actually read the under hood sticker and found the directions to set the timing.. thread here
http://www.automotiveforums.com/vbul...d.php?t=423828
I left the distrib where it was and pulled the Timing wire, and wow.. the TBI was sucking tons of air and idled like crap.. for shits and giggles I checked the timing and the mark wasnt even in range, infact it was almost opposite of where the marks were. I got it on 0 degrees before TDC, plugged the wire in and viola.. runs like new again.
I'd say put your timing gears on how the marks should be (pointing to each other), line up the balancer mark with the timing mark and then check your rotor postion. Re-seat your distrib if necessary, and see if it starts. If it does, unplug the timing wire and set your timing accordingly.