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To get an idea of what is happening, go frame by frame if possible. It sure looks to me like it is turning the tire hard at the hit. The Hoosier lettering on the right rear blurs out instantly.
If it were mine, I would get the front very loose with LOTS of travel, with a rubber stop built into the travel limiter. for when you start to shorten it up. It won't unload the rear tires as easily when it hits the stop. Soften the rear extension to about 1 /4 of total control or less and video some more. At that point if the car can get weight transfer, the tire should stick then spin. If you can get the car to do that, then tighten the rear extension till the 60 fts quit improving.
If it still won't leave without initial spin, or you can't stop it from spinning down track (one or two feet) then something else is amiss. Too stiff on springs, either end. Front shocks too stiff or front end not loose enough.
Once the car leaves hard or shows it needs preload to leave straight, adjust that. Then you can move to the front and see if there is any tuning needed there, like to slow/reduce wheelstands or soften landings.

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looks like you dont get much separation
at all, which is strange on a ladder bar... loosen
the rear shocks.... work on the front end

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the extension is on full loose it, the compression is set in the middle. springs are 120lbs. the front shocks can be loosened some more. i normaly don"t make adjustments during practice, so i'll tweak some next i take it out. i knew i'd get some educated eyes here. i really don't have a clue on how to set suspension. this pict was the first run and it spun so bad i aborted the run. tires were at 11 psi. Al, sorry you did'nt make it , i was looking foward to you coming down. i did fair pretty good that day, went out in the simi's. one round away from the $620.00 pot. oh well, next time

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"tires were at 11#.." I have the same set-up and problems as you do. I have been running the Hoosier 11.5/29.5W/15. I have been playing with the air pressure and my tires like more air. I run 13# and they do better. I do not really like the Hoosiers. I believe that is part of my/our problem, but I can't find any Phoenix tires to buy. Also, my local track is not very well prepped and doesn't really hook good till the sun gets off it in the evening..then the best I have been able to 60' is in the 1.45 area...

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I really enjoy these threads. I have been having trouble getting my car to hook up like I think it should. I have watched this type thread and everybody is telling everybody else, that you need double adjustable shocks. I figured everybody else is probably right. I bite the bullet,,buy $500.00 Afco double adjustable rear shocks. They are a good/pretty looking piece. I install and start out with both adjustments at '0' or the softest compression and the softest extention. I have adjusted the compression tighter, but have been leaving the extention LOOSE. I have tried them both in the middle of the 'clicks',,,I don't see any, or VERY little change. I see people on here talking "one click" on this and "one click" on that,,I am calling BS on the 'one' click.. I haven't been to a track yet that I could hook consistently on except Magnolia. There it was fine.. ,,just alittle TOO far away from home.

To give some info on car: 3300+ A-body, stock front end, CE 90/10 shocks on front, with 318 torsion bars, 2x3 box frame to rear, ladder bars/coil overs w/120# springs, with diagonal link, 8 point cage, 493 RB, 727, 4.10 Dana. Bests so far [Email]10.40@130+[/Email] and [Email]6.43@107[/Email] (the 1/8 times were in REALLY good air last Fall at Clay City..about 40* all day Saturday!!

Don't mean to high-jack,,just putting some comparison out here,,

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Try the extension alot tighter.. dont be afraid
to run the extreme on them
EDIT
I would get rid of the front shocks... never seen
a good CE shock... plus... get the front LOOSE