short log

Well, for the background:
It's a 94 Z28, with exhaust, !AIR,!EGR, longtubes, and about 140k on the clock.
It's been sitting up for a while, got it out today, got it to fire up and got a short log of it idling. When I blip the throttle, I get it chokes for a split second, like timing is being pulled or it's choking... not sure. Earlier today I was letting it warm up, and the RPMs were all over the place, up to probably 1500, and almost low enough to stall out... I was inside and heard it idling sporadically.
As soon as I go to get a log, it doesn't do it anymore... go figure.

I've tried reading documentation on understanding logs, and I've got a very minimal understanding. Anywho, if someone could take a look and see if anything is blatantly out of spec, I'd appreciate it very much. Thanks!