Please help me ID witch McCullough this is

[RuppRestoration]

Engine turns over fine has compression but I'm just not sure how many CC's it is don't see any markings and how much would it cost to rebuild it. And any recommendations on who to send it to.also I've seen some.witj chrome covers on the top is that an addition or did those.ones.come.with that cover I'd like to Polish mall the aluminum up on it then see if I can't find a McCullough kart for her but if not probably auction it. Or keep it in a shelf to admire in the living room just wouldn't want it to go to wast

 

[Jim Donovan]

Since I don't see any head bolts, it most likely is a McCulloch 49. Was the crank tapered or was it a straight 5/8" with left hand threads and no keyway? A picture from the side showing crank would help.

Jim