i havent read through all of this but my mate did a similar build to a c4 block
ek9 pistons
acl bearings
skunk2 inlet
itr cams
skunk2 rets and valves (pro series)
it was tuned on neptune by baby bhp and made 197 whp , didnt cost him an affull lot tbh and he could have made up to 215 whp...