Hi,
nice work. I did the same with my MX-3 16v engine. Larger and polished ports, polished valves and as intake camshaft the exhaust camshaft from a miata. I suggest you to change the camshafts too!!! A german company, which is specialized in this, is called "DBilas dynamics"
The gearbox i used from a BG, do you also want to change it?
Its a really good idea to customize the ports. My 1.6 16v reached 230 km/h with the new long 5. gear. o you want to change the injectors? i used it from the 1.8 16v engine, maybe you can use some from the 2.5 V6!? I am not sure if this works on the K8.
A friend of mine swapped a 2,5 KLZE in a MX-3, he was really satisfied after using a higher gasoline pressure valve. I also tried it in his car, awsome difference. Maybe you can also ad this on you engine, as long as its still not replaced
The problem was, i drove 2000km and the engine blows on the german autobahn. I suggest you to enlarge you oilcooler!!
In addition i add some pictures for the xedos 6 1.6 16v engine drivers. Nearly same engine as im MX-3