[michaelovitch]

Hi.

NA head camshafts have ,according to members here, wich made the measures, more opening duration : 2 degrees i think and sooner.
not change on lift if i'm right.

900 heads have a combustion chamber while 200 and 700 heads are flat. so bigger compression ratio in absolute.

but less efficiency in gaz transfer in my opinion.

700 tic have tappets from factory.
i think it's following the year.

hydraulic lifters are more comfortable, less noisy and maintenance free BUT you loose a bit in valve lift.
tappets are better in performance if you keep a minimum of gap between the camshaft and the tappet you will have maximum possible lift.



i guess you mean the nipple for the coolant hose ?

so yes the na have a nipple in the head the turbos in the block. just plug one of them. or use the two with a Y adaptor : it's better for the head to have a constant coolant flow at the back of it where it's the hotter and the more far of the water pump.

i suggest you to install an oil /coolant cooler if you don't have one. like in the 700 series.