I was going to mention the 3.79 as well, it’d make a 401 inch engine in the op’s bloc. At the risk of bench racing, it would have a little more piston stability and less rod angularity than the 4 or 4-1/8 inch stroke engine. It would work very well with a set of mildly prepped W2 heads.
True, but it’s small in differences. I’d rather opt for the 3.79 stroke myself. But it gets a little pricey on the off beat stuff. So the 4.00 arm would be choice.
