Originally Posted by Wildwood

The 'problem' is that both upper and lower cups fit rather easily into the headtube of this '72 Holdsworth Pro. They only become snug with ~1 to 1.5mm remaining and could be pressed in by hand the remaining distance with little effort. I checked with a new headset and new fits even more loosely. The bottom race was pressed on to the fork crown by bike shop so I intend to proceed with the assembly (after I source caged bearings), but my query to the group is:

1. Should I build as normal, test ride and if normal = forget-about-it?
2. Build it and substitute a thread lock product instead of grease?
3. Something else?

This is a rough build to ride and verify the frameset straightness, characteristics, etc. But the headset issue must be decided. Might be a keeper and worth re-doing paint & decals if all goes well.
Pics show the small distance left after lightly putting into place.

Thanks in advance for all opinions.