[TR] TR2/3 overdrive relay.

[Angelo Graham]

Hello List:
Trying to sort out my overdrive circuits and suspicious about the o/d 
relay. It is the original Lucas item  - only 57 years old.
Can you substitute a generic 30 amp four connector relay for the o/d relay?
Would like to pick one up at my local flaps; having modern push on 
connectors would help matters as well as I wouldn't have to modify the 
harness.
Any advice on this one?
Thanks in advance.
Angelo Graham