Im still going to use tig and treat the chambers valves with heat proof coating.
After looking seriously at the zx14 head it will be easier to fit it on than I
first thought but then I wont be able to bore to 87mm as the head chambers are
to wide on the kawa head and valve inclination is about 17 degrees close to flat.
The ca20 soch cam head will allow me to bore to offset bore 87mm.
So for 1988cc it will be better to go the 8v head than stay at 1809cc with 16v.
Then I can also turbo the engine for more with the ca16de block and 87mm bores ;)

Kawasaki ZX14 06-08
Bolt Size - 8mm SPS
Length - 4.429"/112.50mm
PE Width - 0.750"/19.05mm
BE Width - 0.931"/23.65mm
BE Bore - 1.6144"/41.006mm
Pin Dia - 20mm