Nothing personal against you Dave, but.....I have never understood some people's concerns about fibre timing gears and choosing to replace them with noisier steel ones (except for competition). Our B18/20 engines are not too noisy for OHV designs of their era, partly due to the choice of fibre timing gears instead of chains. Chains stretch over time, become rattly and can cause a lot of damage if they break, modern OHC engines use toothed belts that need changing at typically 60k miles or so. When a fibre timing gear starts to break up it often gives plenty of warning and is unlikely to cause any more damage than giving you a long walk home. So when after 50yrs of good service, why not replace with another fibre gear it will probably live longer than you and hopefully so will the car
