I have been running some ideas through my head for the engine in my 89 p/u. Looking at pistons I see that some are made to use 5.70" rods and others are made to run 6" rods. If the stroke is the same then what are the benefits of running a longer rod? The piston would be designed to have the wrist pin farther up int he piston but the length from the crank to the piston top would remain unchanged, correct? So what would be the benefit of the longer rod?