Mopar SS leaf springs

Is that really true though? I've never tried running two RH or two LH. I run stock style springs, which are identical side to side. They sit level and work fine at the track.
Is what true? That using two of the same springs will make it sit level? Yes.

Or that using the springs as designed will cause the car to launch straight? Yes.

Or that using two same part numbers will make it more difficult to tune a good launch? Yes.

Take your pick. lol

For a car that sees track time, all one needs to do is read the MP suspension book, install some SS springs, set it up like the book says and it'll fall in place. Nothing like having instructions, but people still try to reinvent the wheel.