| That is a legitimate concern. We took several junk bare blocks and drilled them out considerably further to see where the limits were and concluded that there is enough "meat". For additional testing we've also put over 200 ft-lbs of torque on some studs in some of the holes in the junk test blocks we drilled to make sure they would hold.
Russell Floyd Z1 Motorsports www.300zx.com 1990+ Nissan Z specialists Used Parts, New parts, Service/Repair and Performance Z1 Motorsports Exclusive Parts Line 2877 Carrollton Villa Rica Hwy Carrollton, Ga 30116 770-838-7777 770-832-9253 (fax) 
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