[rusty76]

I was thinking the same thing as above about the two bolt. My 400 is a two bolt and honestly I never considered if I needed it to be a four bolt. I'll be honest if you were going to be making serious power the four bolt probably be on the same level as the two. Some guys build using a two bolt and use aftermarket caps. That way they get stronger caps instead of the stock stuff. But either way it comes down to what you are comfortable with. If you were building a 1000 hp engine you'd go aftermarket. Glad to see things are moving along for you.