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It looks like there could be a slight bore offset - the cylinders may be a bit to the left of the crank center as we see it in the photo. It does look like the valves are directly below the cam with no rocker arms.
I'd guess there is no crankshaft installed, as it is sitting on the cart.
I wish there was a object we could get a sense of scale from. I think this is smaller than we may think. Long intake runners is good for torque, right? It looks like it could be oversquare.
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