Here is a great cut away sectional I had done not long ago to showcase how the VG30DE architecture really is.  For a V6 to weigh in at 130lbs bare, this block exudes ultimate strength. Even though its a 2 bolt main the main web structure is very intact and is VERY hard to distort.  The weak part being the main girdle is what sends these blocks in with windows in the side of the block.  Once the cast girdle gives way destruction ensues.

Overall the design of this block was well engineered and rightfully so.  It was a huge leap in VG performance over the SOHC VG30E series block.  Needless to say this DE block upgrade that made its way into the 1990+ vehicles had a much better chance at making power and sustaining it.  Only downfall was the single case iron girdle.  Don’t worry though a proper solution is available to strengthen that part of the block.  We have or very own billet main cap kit that replaces the stock case girdle and reduces weight by 2lbs and is considerably stronger than the factory piece.  Check out these pics!