I spent alot of time on the dyno when I had my 206/210 cam in my L31 only to find out that the Hypertech spark table was within 1-2° of perfect for the L31 in my Express. I also ran the Hypertech in my Titan and that truck put down 300 RWHP on a Mustang dyno and 390 RWTQ with only the Tune, Airaid CAI, and Magnaflow muffler swap.
Its also going in an Express so makes sense to me to have the operating system match the vehicle.
The tune I used in the 99 L31 Suburban was also Hypertech based.
When I traded off the Titan, I put the Hypertech on my Mom's Nissan Pathfinder with the 4.0L. It SCOOTS along very well.
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