How much of a difference does seam welding make?

[inertiaticism]

I'm in the process of getting more serious about turning my S14 into a track car, and was wondering who here had seam/stitch welded their chassis and how much difference it made.
My chassis has been hit twice before I bought it, had quite a few offs since I bought it and you can tell it has a lot of miles on it.
I was planning on getting it put on a frame rack, would it be a better idea to wait until after I get it pulled straight to stitch weld it, or weld it first, then have it racked.
It's not so crooked that I should be looking for a new chassis, I just want a good platform to build on.

[irax]

have it pulled str8 first then stitch weld it. I have the same problem.. well my frame is straight, just been in 2 front end crashes so i want it stitch welded. I have a few friends and other poeple tell me that when they had their car stitched it was very noticable (they all did not have roll cages)

[uthemofo]

it is noticable, Make sure you do it right though and do it in the right spots and your car will stiffin up.