Okay, it’s time to drill and tap for the exhaust studs. This has to be cock-on; you can see that I’ve used studs screwed into adjacent holes to get the angles correct, so it’s got to be perfect!
After I’m happy with the repairs to the head, John at The Head Shop at Warrington did a lovely clean-up on the seats and also lightly trimmed the valves, cutting different angles on the throat, seat and then top face. Again, a bit like the ring gap deal, you’ll never realise the full potential of your motor unless the seats are bob on. John has a £20k machine to ensure that the seats are good. I’m very happy to pay him to provide that service, and no, I won’t be waxing lyrical about grinding paste and valve suckers. If the seats are prepared to perfection and the
