What I was saying Mick, would a early round barrel fit straight onto my engine, if I found one that is.
Well I feel the frame is a early model, its not a 68 model. so would be happy to say my bike is a 67 model, and being a early numbered engine I think a round barrel would fit.
Whoops, I didn't get that at the time.
Anything is possible with the right budget or skills and machinery, but I am thinking it is far from a straight bolt on swap.
I am busy at the moment, I will see if I can get some cases etc out later, picture, measure and show the difference.
You would never get it through at National level as a pre65 though, very easy to tell the difference from the outside of a Squarie bottom end to the Oval barrel bottom end.
And as well there is the very visible outside date and model number in the crank case casting(and I am not talking about the stamped ones)
I have the tenth one made of one of these 360s with the correct pre-65 numbers etc.
I have stripped it down to use as a dirt bike, now with the addition of a correct and complete 64 MC360 engine.
I want another of those X3 frames to put all the road gear on and the Oval road engine in.
I will be gob smacked if you find an alloy oval engine or top end.