I got front monoleaf springs from CPP on my daily 1/2ton 52 chevy for 3 years now.
I drive freeways, city and bumpy dirt roads and can only say the very best things about them.
They have even more travel than the original (worn) ones and I never bottomed out.
I never worry about them breaking sooner than any other critical part under stress.
Like Eaton springs says, if springs are properly designed there is not a problem. These seem very well designed and could handle a lot more load.
I think Patricks sells the same ones and gets them from CPP.
On the rear I kept the original multileafs but used lowering blocks from Jim Carter.
