I was looking on ebay, I think they are using the front head. If you notice on the picture of the Vmax block it has a banjo fitting oil line setup. On the front head that banjo fitting is to the back. It appears in the pictures above that the n360 is using the front head.
I bet the crank shaft would be pretty pissed after a little while.
I am curious as to what the power out put was? That car seemed to pull through the gears awfully quick. I wonder if he is using the tn360 final drive? I think its the tn360 or the n360 station wagon thing that has the shorter final drive. Or in all actuality I wonder if he has a custom final. Also did anyone notice that it looks like he is using different jugs? The fins are much longer all around the bore center.
Also looking at the gasket overlay I am wondering how they are getting oil to the head, how the head bolts align, and if they are filling in the coolant cavities to make use of more head surface.
Actually though, now looking at the pictures again I bet that the jugs are custom. I bet they are made to be an "adapter" style jug so that they align with the head bolts to hold the jugs on the block, then I bet the top of the jugs are drilled to match the head bolt style of the Yamaha head, and use the Yamaha head gasket.
If there was someone over there making the jugs and we could buy them it would be a "bolt on." There are several people over in Japan running this set up on 360-400cc engines. I don't know if it would really be worth putting this head on a 600cc. The 360 and 400 rev so high I bet it really does a wonder for them. Regardless though I bet it would still do pretty well on a 600.
Good find on the video!