What real difference does the lsa on a cam make?

Well, I shipped the cam to the grinders today. I also decided to go with a split cam profile of 224/230 duration at .050 lift, 496/510 lift with a 1.6 ratio rocker and a 112 lobe separation. So far I spent 120 to grind the cam, 18 to ship and another 18 to ship it back. Way more affordable then a new $315 cam from comp. I will likely need longer push rods though, anyone know where I can get magnum push rods in different lengths?