Hello, I've got an LS6 (243 heads) swapped in to my track-only drift car, and am now looking in to upgrading the cam. A friend who has an LS1 with 243 heads sent me his custom specs (comp), which are
231/240 .599/.589 lift 112lsa
I can't find anything OTS in this grind, but it seems like this cam is the closest
http://www.speedinc.com/shop-by-manu...m-231-237.html

Basically I am looking for a power/torque increase, but I don't want a crazy cam that's going to put my valvetrain at risk. This engine sees 6200 rpm constant and often, and reliability is my #1 concern. The higher the torque at the lower the RPM the better.

Also, what valvesprings should I be looking at to do something like this?

Thanks!