Quote: The heads have a lot left in them, I think my head porter's flow bench is a little stingy so that's why I include the from/to #'s and increase numbers.
I noticed that in your original post, so I am guessing on another flow bench your heads might flow 340 or more.
I think 0.20 is there, and maybe a little bit more. I would have liked to see you add more CR by milling the heads or something. I am thinking the roller cam will like the finish line rpm better than the flat tappet did, so you will see a mph increase. (7600?, 4.56, 32", 142 mph)
Will your KB block be 4.500" bore? That should get your CR close to 13.0 and the alcohol will support much more. I would mill the heads when you build that motor.
