Dimensions of 944 torsion bars

[VEEMAN]

Good Day to one and all,
Can anyone give the sizes of the torsion bar i.e the diameter and length for an 1985 Porsche 944 2.5 lux.
Will the above torsion bars be suitable to fit an 03 with the ali a arms.
One more point will the above stiffen up the rear end more than the original 03 torsion bars, or has anyone a better solution.
Your help is appreciated.
Cheers
VEEMAN