[Healeys] brake pipe threaded ends

[Tom]

Hi,

I'm removing my late BJ8's front calipers, and the nut and brake line into
the caliper are stuck.   The nut's threads in the caliper are OK, but the
nut and brake line seem frozen.

Any ideas on getting this unstuck.    If I end up twisting the nut off the
brake line,  can I run to Napa and get a short piece of brake line and bend
to fit?   Or are the threads a vintage British size?

thanks,

Tom