Sponsored Links (Register now to hide all advertisements)
Voltage regulators are interchangeable and what you want to do is OK.
They operate on voltage not amperage.
You may need to set it though. It is a case of suck it and see!
You say the old one is not working properly, it probably just needs cleaning up and resetting also. The springs on the contacts do give way after a while - 55 years isn't bad though.
Regards