20v water galleries

[road rally]

Help needed please, i am currently in the middle of fitting a black top 20v into my ae86 and need some info on the water galleries on the back of the head,not wanting to cut the bulkhead have checked out the chita type kit what i need to know is there are two waterways does the waterway on the inlet side on the back of the head get blanked off as the pictures of the chita conversion back plate seems to show or is there or has the back of this plate been machined in some way to allow the water to travel between the two galleries, any photos or info would be most welcome

[Hopi]

http://koti.phnet.fi/vanaja/ and link "kuvat 1"

[Ivan141]

I believe they drill the separating wall between the two chambers in the head so water can flow freely, then blank off the hole.

[road rally]

Thanks for the quick response,cheers Hopi for the photos i think this is the best option rather than drilling the head as thats a one way street .
Could anyone enlighten me as to what throttle cable to use preferably a toyota item the car is rhd i did read somewhere that a supra cable will fit the pedal and linkage and is long enough but i connot remember which model supra its from or a part number would be great.