what size torsions for a 69 dart for a little better handling?

In retrospect;
Maybe the .890 bars wouldda been ok with better shocks and a bigger than factory Sbars. I installed the 1.03s at the same time as the big Hitchkiss bar, to go rally-crossing, and our grass-track had a nasty berm in it to slow people down on the finish-run. It was my intent to hit that berm flat out and sail into the sunset, kindof thing. Well I hit it, and I sailed, and when I came down, I buried my oilpan, and that almost stopped the car cold, but I mashed the gas to the floor and crossed the finish line in a blaze of glory, smoke and earthen clods.
They banned me.
Anyway I liked that set-up so much, I never took it off.And that was about 2006ish,I'm guessing.I could probably get away with less T-bar,but........... they're staying!
Yeah so if anyone out there wants to jump their As, be forewarned; the front comes down first, and it comes down really hard,and you need more than a berm, cuz when the back gets to it, it really messes up your flight!lol.

BTW, that berm was tearing the front ends of a lot of strut suspension cars. Almost nothing looks as funny as a fwd 4-banger car sitting on top of one of its front wheels, on top of a berm, and the numskull inside is trying to back off the hill....unless it's a rwd4-banger car sitting on top of both of its tires, on top of a berm, and the numbskull inside is also trying to back off the hill!.....or seeing a rad fall down through bottom of the car, as the car comes to rest on one of it's front wheels, on top of a berm, and the .....well you get it. The carnage that day was awesome.:) I was the only V8 car there that day, and I didn't win :(. But I had a superb time :) with my son, and we drove home :); unlike the vast majority of the other participants.:(
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Reading your story put a big smile on my face, i would've loved to have seen that.