Is align boring necessary

No, it is not a mandotory thing to do. Of course, if there was a problem with the crank bearings before hand and the crank was slapping anout in the engine.... it would help create a better longer lasting engine. Need it or not.

Pioneer is a company that makes quality bolts for less. You may also want Check ma MoPar as well. There really is t a damn thing wrong with OE material. I have used MoPar main blots before and been in the low 12's.