The video needs to be closer and slow motion. I went through a similar thing but my car was losing 60 and I couldn’t get it back . If you search me you will find the thread . In short I ended up getting cal tracs and double adjustable shocks all the way around . In the long run Ingot it back to 1.40 . This year had the converter freshened no other changes and it’s 1.35 and .10 faster overall .
Video will help greatly.
If I go today I'll try to get a better video. The thing should 60 in the 1.40s. If I was having traction problems I would consider Cal tracs and better shocks. As for my convertor It only has about 25 passes on it, and have considered it possibly being the issue.