604 questions

[haykay]

got a 604 and need to put new springs on it. whats the best thing out there, keeping it nesmith legal! does anyone know the part # for the cam?

[Egoracing]

GM Part #12495494 are the only springs allowed, that is for the set of springs.

[Steve_Hendren]

Be sure to check the rules update on the NeSmith racing series web site. GM will be changing their new GM Performance book to allow people to shim their installed heights to the recommended 1.780". This now means you can use whatever shims necessary (not limited to one .020" shim anymore) to reach the 1.780" installed height. NeSmith has already put this rule into affect, and I'm expecting other series to follow suit when the new GM tech book is released.