ATI is probably an hour's drive from me (no traffic), but I've never been sure they were the way to go, either. They told me years ago that I should run an 8", which I thought was a bit absurd for a low-11 second car (at that time).
ATI is still very popular with the stock/superstock crowd.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads