How to determine which u-joint to buy

JohnKorte

Seaman
Joined
Dec 30, 2013
Messages
53
I have a Alpha outdrive gen II, ser#OL417484. The part manual states that both were used for that serial #.
Grey Meritor 805536A2 or Black GKN 865493A01. Mine has been replaced by previous owner with a generic I think.
So I am trying to determine which one to buy.
thanks
 
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