[Healeys] speedo change

[allen c miller jr]

Can anyone advise whether it is possible to have a 100-4 speedo face fitted to
a later model magnolia speedo that drives off the BN4. I have change my
gearbox and rear axle to a non-overdrive BN4 tranny and differential, and it
would seem easiest to simply have a 100-4 black dial speedo face fitted to a
BN4 - BN7 speedometer case.
I have a good  magnolia sppedo body that is partially seized up, but I think
might be restorable. Any thoughts appreciated.

Allen Miller
BN2/M