Gazza,

You said length of thread, which I also asked about and they didnt know, neither did they know what type of thread or its diameter.

I also asked for other information.

The person I spoke to didnt know much at all, just there to take orders I guess.

Alan,

As stated above I dont have a set of BC units but I am looking into buying a set and need to know if std pattern top mounts will fit.

If I had a set infront of me I would be able to test fit like you said, no probs, but unfortunately I dont.
