"451 Manifesto"

....Looking at 440Source's web site they have kits for both a 451 and a 470. They have the 451 showing a stroke of 3.750" using a 6.760" rod. They show the 470 kit using a 3.915" crank using a 6.535" rod. I remember seeing a post from Mike at MRL a while back, at least I think it was him, on a site somewhere that he made mention of a 470 using the longer rods. Can the 470 be built with the 6.760" rod? If so, what does it do to the power curve, assuming equal compression, cam and airflow? Seem to remember Mike mentioning that the torque curve was a good bit different, and that it was more of a truck style power curve, sacrificing a bit of top end for the midrange. Or did I just chug too much bong water lately?