My question is what exactly different from a gsr engine to an ls. I know the LS has a lower output water and oil pump, the crank is not zero balanced, the stroke is up like 1.6mm, the rods and rod bolts are not as strong, LS has no oil squirters, and no crank girdle. So how balanced is the LS engine. Also is there any other differences that I didnt put down. Any differences anyone wants to put would be appreciated. Thanks J