Strange torsion bar issue on my 1965 barracuda. Please Help.

Hi Guys,
I wasn't able to read the stamped numbers on my T-Bars yet, but I measured them from underneath at about .860 to .880 or so in diameter.
Does anyone know the torsion bar p/ns. [I know there are 2 p/n's, even and odd, for left and right side].

Here is my problem. I crank in the torsion bar adjustment bolt, and it doesn't really raise up the front. [I also have a 1964 that adjusts correctly].
Both cars have the same dia. torsion bars. and the same size oversize 15" tires.
The distance from the ground to the bottom center of the wheel well on my '64 as currently adjusted is 25-3/4".
The 65 after adjusting is only at 24-1/4 on one side, and 23-7/8 on the passenger side so the tires hit the wheel well. [I can't get them even]
The '65 has a front disc brake conversion and the stock s. box.
The '64 has 9" front drums with the Borgeson s. box conversion.

I am thinking the torsion bars are weak, since I can see the adjuster moving up and down, as I turn the adjusting bolt.
No binding in the suspension. and if it does raise up... after driving it settles back down to almost where it was before adjusting as if I never adjusted the bolt
Am I correct in thinking the torsion bars are weak?
And where do I get 'new stock' dia. torsion bars? [if they make them]
I really don't want to go to a bigger diameter T-bar, I am afraid it will stiffen up the ride.
Angelo aka Guido