really if you had the 1600 ready to go in, you might as well throw it in then put the 2l on an engine stand, depending on what you wanted to do with it , i would rather spend money on a 2l than a 1600,
also there was a thread on turbosport that showed they almost weighed the same, where did you get the weight from?
and those figures quoted seem a bit odd, for a std engine with std exhaust of that era to be making max power at 6000rpm seems high in the rev range , i would expect that from a mild engine