Snakepit is the Superformance dealer for the northeast. There are also a few sub-dealers - more dealers are being added all the time.....
I bought my SPF from Stonebridge Motor Company
http://www.stonebridgecars.com
Tom & Don Coon are great guys, good friends - several of their customers are here on CC.
That said, if I bought another new SPF, I would probably buy from Olthoff Racing or Snakepit. These guys are some of the original dealers for SPF, and have earned their stripes. There is a lot of experience there that can be of great benefit to buying (and maintaining) your new SPF.
As much as possible, make sure your future dealer (and installer) is in it for the long haul. The SPF is a great car, and is built and backed by a great company. Jim Price (owner of Hi-Tech which builds Superformance vehicles) is as enthusiastic about Cobras (and GT40's, Coupes, ect) as anyone here, and builds a great product. Lance Standler (owner of Superformance) and his staff are scond to none in this industry.
Have fun picking your engine/trans combo, and talk (several times before buying) to your future dealer/subdealer before pulling the trigger!
Jim Kellogg
Breesport, NY