727 low gear set - worth the investment?

Hi guys,

As I want to improve my quarter mile passes, and I don't have the budget to built a stroker engine, a friend of mine suggested to install a low gear set in my 727.

I would like to know if it's worth the investment and if someone here had any trouble after installing these kind of gears.

Should I expect at least low 12's for a car that runs 13.09?

Oh yeah.... I have a 3.55 with an auburn gear pro series limited slip.
The tranny is mostly stock except for a B&M transpack and a superstreetfighter 3500 stall torque

Many thanks :-)