1969 Camaro LS3 - Power Steering

[Camaroinaz]

Hi all - I am running an LS3 in my 1969 Camaro and have a continued problem with my power steering. I am running the 2014 Corvette power steering pump with stock pulley and the 1969 Camaro stock steering box. I keep having a leak at the power steering box. I am thinking it may be related to the pressure that the newer power steering pump is putting out, but wanted to see what others have experienced and see if there are any recommendations? Does the newer pump put out too much pressure for the older style steering box? Thanks.