rear track, different both sides!

[1303R]

hey, i just been checking some stuff on my car, tried out some 10x18's. and it seams there is a difference left to right. wheels fit ok on left hand side with a 21mm spacer but foul the body mounting on the right side did vw change the trailing arm on the beetle in it's life? wonder if i have two different ones? they're standard 1303 arms, as far as i know. and have early 944 brakes. the car has had lots of welding in the past so may be twisted? is nearly 10mm difference! where can i measure from to check?

[Kafer_Mike]

It's more likely the body not sitting square on the pan...

[1303R]

thanks for the input. been out there with the tape measure and measured from rear of brake carrier to frame horns and it's out. thou the rear tracking needs setting. i'll have a go at setting that tomorrow, both the inner pivot points have washer/spacers set the same, ie both on outside. so just adjust the track on the arms?