C4 suspension question

[Jk1]

Hi all!

I´m thinking about using Corvette C4 axles in my old Mopar. But is there any OFFICIAL information about the bearing capacity of the axles? Or where/who to ask? Here in my country the law says the axles have to have same/better load capacity as the original. My car weighs about 3500 pounds, 4800 fully loaded. C4 weighs 3300 pounds, 3700 fully loaded. These numbers are frome the government database. So if there is no better info, the axle swap is illegal
In other countries this is not a problem but showing a magazine article is not official enough

I hope somebody can help me! Thanks!

Jouni