Okay, here's my plan. Tomorrow I will bore the intake port out to 14 mm, it was what I planned to do. If I screw it up, I can get another one from Peter I will also take the jug to 1977 and talk to the folks there, see if they can hone it for me so I can break the rings in properly.
Y'know, as much work as it turns out to be, it's a lot of fun doing mod work!