What exactly do you mean by "Blowing Blocks?" Have you spun a bearing, deprived something of oil, broke a rod, detonated, etc???

If you want to stick with an LS-Vtec setup, either buy aftermarket rods rods or have OEM fitted with ARP rod bolts. This will enable you to rev as high as power is made.

For a trouble free remedy, build a GSR block this time.