I'm trying to read and learn as much as possible as I'm thinking on a 383 for my '90 K5. I ran across this article from "Hot Rod" magazine. So is this guy basically saying that the only advantage to "stroking" an engine is the increase in displacement? http://www.hotrod.com/tipstricks/34219/index30.html Why Rod Length Doesn’t Matter I’ve read as many articles and books as the next guy when it comes to connecting-rod length. Essentially, there are a couple of accepted theories Some state that that short rods are better, others that long rods are. Neither might be correct. Not only has Reher-Morrison plotted points on a graph using three big-block Chevy rod combinations (stock--6.135-inch; +0.250--6.385-inch and +0.400--6.535-inch) to show piston movement through crankshaft movement, and also built a test engine to prove the theory. To be honest, when the plotted graph points are overlaid on the same page, the traces are so close, it’s virtually impossible to differentiate between them. At 10-degrees ATDC (a point where the most pressure is present in the cylinder on the power stroke), the difference between the shortest rod combination and the longest rod is a mere 0.0004-inch (that’s not a misprint; it’s four ten-thousandths of an inch). A small block test engine showed basically the same results, only this time, it was on a running dyno mule. Contrary to what some experts have touted, the tests (which were very comprehensive) showed zero gain with long rods, particularly past 1500 rpm. In simple terms, the connecting rod links the piston pin to the crank. There’s nothing more to it, so don’t waste your time working with weird rod length combinations.