Definately not a "break up" more of a bog/stall type thing. Let off the gas and bang she comes right back. The car hits 4900/5000 RPMs and bang, falls flat on it's face. If I shift just prior to that, no issues. It just sucks because you can't top out 2nd & 3rd due to this issue.

I had this problem at the track last Nov. at the stock appearing drags. I was running against by buddy's 68 GTO, he cut a .005 and I had a .450 off the line and in first gear at the 60' time I was almost caught up to him and pulling stronger, then comes second gear everything is good, then hit the top of second, blah choke and away he went. I was so mad! LOL