I am in the process of overhauling the front control arms on my 73-2.0L.

The factory original torsion bars measure close to 18mm in diameter and are stamped A8 on one end.

I bought a pair of repainted torsion bars that measure the same (18mm) and are stamped J8 on one end.

Are the A8 and J8 torsion bars essentially the same?

I will be installing Koni Sport adjustables, new ball joint, and after market factory style rubber bushings.

I freshened up the rear suspension last year by installing Koni Sport adjustables with 150lb springs and Ground Control coil over kit.

Are factory 18mm torsion bars in the front a good match for the rear setup?

TIA

I have 165 lb. progressive springs in the back and 21mm torsion bars in the front. That combo seems to work good for me. I have no idea what the stampings j8 and a8 mean.