How to remove hard inquiries from a Transunion?

I messed up with my credit. I'm trying to apply for a mortgage, but my score's sitting at 602. I've got about 70 inquiries ranging from two years back to more recent ones. Moreover, I've got a Chapter 13 bankruptcy that might drop off in around four months.
If I directly dispute these inquiries with the credit agency what impact could that have? I want to fix things without accidentally messing up the good stuff.