Hi All, Looking for little guidance on a blown 540 combination - KB600, conventional BBC Oddy's Dart 400 cylinder heads, 1471 Littlefiled, 11.5 static, 1.7 rocker ratio. This short block was assembled at KB in 2007, with a Crower custom supercharger grind with 278 / 278 @.050 duration and .714 lift on 114 lobe separation, .904 lifter and 1.70 rocker ratio. I am not privy to the reasons behind this original custom grind spec. The engine has never been fired. All of the reading I have done on this site points to a standard cam spec near 285-290 duration @.050 and .785 -.795 lift. for blown alky combinations. I realize that is a very general statement. Engine is completely disassembled. So question is , do I use the original Crower cam spec'd in 2007 or does it make sense to upgrade while the engine is apart. Dragster / powerglide application. Thank you.