I am in the process of moving challenger leaf springs in with a DR. Diff 1.5" kit.

Trying to fit 295/65-15 drag radial on 10 " rim.

I am using the calvert monoleaf's.
Calvert's customer service is incredible.
They exchanged the springs 2 times at no charge.

I would buy the Caltracs in a heartbeat if I knew they would fit. Because of the Dr. Diff front spring mounts clearance will be an issue, not only the mount but with the hard brake line.

I am in the process of fabing my oun triangle pivots. so I don't have to move the brake line and line mount. I would prefer to buy the caltracs, But I just dont think they will work without serious mods. I have about $225.00 in parts alone to make my own , so I am not really saving any cost, as I will have a lot of time invested.

I know Calvert offers a triangle with only one transfer hole, for ground clearance. That may be the difference?