Boeing Co. wants Prime Minister Narendra Modi to keep something in mind as he looks to turn India into a defense manufacturing powerhouse: Size matters. With Modi planning to spend $150 billion to modernize military equipment over the next decade, the world's largest aerospace company sees an opportunity to grow its presence in India. Boeing lost out in 2012 to smaller French rival Dassault Aviation in what was then the biggest fighter-jet deal on record. "If India wants to jump start an aerospace economy, do you want to do that with Dassault -- that's about a $5 billion company --...