Spacing issue..., kind of a weird Q? Options

[x3chrissyx3]

Okay, I'll give you the information I'll think you'll need for this one:
I have a CUSTOM MODULE, it's 175 PX, I'm in the process of making my blogbody 400 PX, from 550 PX. I want the entire blog itself to be 400px. I got that part down, but the problem I'm having is that I want my custom module to be closer to my blogbody so I can adjust my page as needed.

It looks like this:

*Grey line is between what I want to adjust* (The black line on the left is the end of my custom module)

But I want it to look more like this:


*With a smaller space between the custom module & my blogbody*


Any way to acheive that? Thanks a ton!