I wonder if motor will ever get done

Comp has a few wacky spring recommendations in their kits....let me guess, they said you needed the 914-16 spring right? They said that for my cam as well....:wack:. My cam has less lift than yours (.576/.582) and I went with the their 939 spring setup at 1.85" (at the recommendation of Ryan J @ Shadydell). That gave me 185# seat and 457# open. I would have run more spring, but my rockers couldn't take anymore without having to switch to something else. With .590 lift on a roller (depending on the ramps) something over 500# open pressure is what I would look for too. With solid rollers it is safer to have a little too much spring pressure than not enough...if you bounce a roller by not having enough spring you will destroy it REALLY fast.