When I bought my Nismo. it was used with 7,000 miles on it. It still had all 3 spacers in each spring. So I think you will be find.
The Nismo doesn't start making power until about 3,500 rpm.
As to veering. The Nismo likes to tramline because of the wide front tires. You should feel what it's like with 275's on the front.
