12 Port, you mention the GMC rod swap improving rod length to stroke ratio. I am assuming that this swap increases the rod length-to-stroke ratio. By how much? With the stock 235 ratio being 1.73, what will the it be with GMC rod? Will this change enhance rapid evacuation of exhaust and/or improve the flow of incoming fuel/air through the inefficient intake ports? It is important for you to know that I do not 'know' anymore about this topic than what I have read in this thread. I am just trying to understand the information that has been presented.
Carl

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission