TR aluminum or rubber crank seal?

[CarlSereda@aol.com]

Does anyone believe in staying with the original aluminum crankshaft seal on 
TR3-4A's anymore?
When properly set up aren't they virtually drip free? It's an old design used 
for at least a decade.
Is it really worth grinding down the crank and retrofitting a new housing for 
a rubber seal?
Carl

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