S1 e-type 3.8. Can the front crank oil seal be replaced by removing the sump without removing the engine.

I have a Getrag 5 speed in my S1 e-type which has a stiff 1st & reverse selection all other gears are excellent. The box was fitted by the previous owner, I have had the car over 10 years & has always suffered with this problem but has not got worse in that time. I have now reached the time in life ...

Electric clock has burnt out, can this be repaired or replaced, any contacts would be appreciated.