trailing arm perch relocation

[scum1]

Can someone tell me some reasoning on potential CONS to placing the trailing arm saddle perches closer together on the axle. I am making my own tubular arms and I would like to run my rear bags on the trailing arm with the upper bag plate located on the inside of the frame. I am trying to get the position as far back towards the rear axle as possible, which would mean the saddles would have to come in approximately 7" on each side, from ~41" total width to 27" total width.
I dont necessarily like the idea of narrowing a triangle setup, but with a solid pan hard bar, is there some specific problems I'm not realizing. this truck is a cruiser, no aggressive driving, so "better handling with stock geometry" doesn't concern me. "unsafe because of x,y,z" does however.

any thoughts?