Hello:
Can anyone tell me if the center rotor and rotor housing of a 20B are different than rotor housings of a 13B?  If they are interchangable, is there a certain year model that is required?  Thanks in advance!
Thanks,
Don Mitchell

I don't thinks so Don. Bruce Turrentine makes 20B's out of 13B parts
(and a 20B shaft and a 20B intermediate housing of course). Come to think of it
the exhaust ports could be bigger on a 20B. That could be a minor problem.

Paul Lamar
 
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