ALERT!! SOUND THE ALARM!!..
I know there was a period of time early on with the BB heads when the assembled heads were being shipped with valves that were too long, and had too big of a head diameter.
I repaired(well, finished repairing) a set a couple of years ago that had been set up that way.
I thought it was probably a one time mistake, but since then I’ve seen other reports of people getting them that way.
Those heads were shipped with BBC valves...... 1.88/2.25...... that were about .250 too long.
The ones I had here had all the guides totally wasted in short order, then the too-big-for-the-heads valves start clipping each other...... and then they break off.
That’s what happened to the set I had here.
https://board.moparts.org/ubbthread...e/some-pro-comp-victor-stuff.html#Post2319050
At the time that head was repaired, a new bare head was a little over $400.......plus it would have needed prep and porting to match the other one.
For what the were selling the bare heads for on Black Friday, it would have been a no brainer to just buy a new head.