gravity5
+1y
The top bars should be about 30 degrees each....and as for lenght, well make the longer they are the less front to rear axle articulation there is during the suspensions range. But make sure the front lower mounts do not hit the ground when layed out. As for the top bars they should go forward as well, and they should be at the same distance front to rear as the bottoms, so they will have to be longer as they are obviously angled. And dont forget the pinion angle, which you set off of the tranny on a 1 piece drifeshaft and the front driveshaft on a 2 piece driveshaft.