Sure, the LS6 (241 casting) heads flow better than the LS1 heasd (853 casting), but it isn't worth pulling them off just for the sake of changing them. If you already have the heads off and 241 heads are easily accessible, do it.
Cheers mate, also is there anyway to fix the vt piston slap?Or will it be cheaper to slap in a vx/vy ls1?