Hi all, thanx for the replies,
A tad more info.
The initial idea was indeed to go the 8v road(hence I have the heads, cams etc..), but I started pondering reading about the lighter 16v valves. So going 16v from now will definitely be more expensive
The 105HP 8v heads are flatheads, so minimal cc's (just 1mm above intake valve + the spark plug gap) I reckon between 5 and 15cc. So 16v heads will definitely set compression back in comparison to 8v heads when using the same dished pistons.
The 89mm venolia 343 pistons are dished, not flat. I measured the cc's of the dish, its about 21.5 cc. I guess the 65mm stroke and the dish dept (5mm)leaves enough space between 16v valves and this piston.
So still some more pondering and calculations to do here ;-)
Any tips on the oil pump? Will the standard pump be strong enough or is an external electrical pump the better choice?