3.250
That stroke will need to be able to turn! I mean around 8,000 to 8,500.. The only reason I am stating this is make sure that the top end you put on this can handle it.. Like this combo will kill you if you have to run a non mechanical cam.. So if your running a hyd cam this is a bad mistake.. Also make sure you run at least a 6.125 or longer rod.. If you only plan on running 6800 I think I would run something like a 3.625 standard bore.. You will see better results in that rpm range.. However if you can turn it that much you will love the 3.250 in the 400.. Just sayin!
Clean Passes saves you Money!
Bookmarks