thanks for the response! gee thats a fair bit heavier than what ive heard the 1uz weighs. Didnt think there'd be such a big difference. I was originally considering the 1uz for the swap but have been tempted by the extra output and nissan heritage of the vh45.
I wonder whether the width of the heads could be much more than the 1uz? I think, this would be my main concern. considering the extra 0.5 of a litre would only add about 60cc to each cylinder. but i guess it comes down more to the design. any insights?