Please need some help!!!

[Chevyssimpala]

I'm rebuilding my top end and I have a wiseco piston .70 over the problem is in the directions it says to drill two holes in the piston it says that this is for extra lubrication is it really nessecary to do this or should I just leave it be ??

 

[03blasteryfs03]

drill u mean bore and hone and bore it 2 .70 over and i beleive there is soposed to be like 4,5,6 thousands of ring clearence ill check later