It's a 221 c.i. Block I had bored to 239 c.i. to clean up the cylinders in it and I had to cut the heads way out to get the valves to clear the isky 400jr cam lift . It's holding together but I can't wait to get an aluminum intake and heads
It runs great. So much fun. I took it up to placerville through emmett and horseshoe bend. I came back to nampa through Idaho city. Awesome ride. Not allot of power so I had to have patience with the flathead.