Ok so here is the update. First of all my bother Jason is not on this site as boost lee explained however I am and have been for a long time now and I am the one that connected my brother Jason with boost lee to make the sale. So I posted this thread to help him unfu-- himself and watch out for others potential buyers. Now the injectors in the purchased engine were guaranteed to b good. Conclusion found today is as boost lee explained 2 injectors stuck open 2 over fueling and 2 were Lly inj. Not even lbz. So the largest problem with this is my brother swapped out an engine that did not need swapped because the so called good injectors were put into the factory engine first and and the engine continued knocking so it was assumed the factory engine was shot. So since he happened to buy a spare. They swapped engines out due to ease and selected to tear into the factory engine once Well final outcome was bum injectors and a lot of work for nothing. Now boost lee is so far working with him. My brother is easy going and settled for 3000 returned even though costs were about double this. New engine cost 3500,new wire harness 600, weeks labor 2000, testing inj 400 and hours of mental stress. Boost lee explained funds r not available at this second however he will surely pay him back within the month. I will keep all posted. I am trusting that he will do the right thing.