Shouldve been more precise... if the first letter is different almost no parts will transfer. If the first is the same and the second is different, some parts may transfer over- but don't bet the farm on it. The only ones I know that that rule applies to is the VQ30 and VG30DE.
i think that its doable, the SR16VE head on the SR20 block, i think that they would fit BUT the prob is the ECU and the VVL, you'd have the VVL BUT if the ECU doesnt know about it then whats the point, reason being that nissan ajusts the valve timing electronically not with a changing cam lobe like honda on there vtec. get what i'm saying? so i think that it can be installed BUT i think that you would have to get a custom ecu to make it work. contact jim wolf, if it can be done, he'd be the one to do it.
GA16DS is a carb version of the GA16DE. The E and the S refer to the fuel delivery system (i=fuel injection, E=electronic fuel injection, S=side draft carb). The D refers to the head. (D=DOHC, V=variable valve timing)
I may be wrong- I've never looked into this... but going by Nissan engine logic the heads on the GA16DE and GA16DS should be very similar if not the same. Both are DOHC. The fuel delivery system and compression ratio are most likely the only differences.
The only think that would interest me on a DE is VTC and I never seen a european model with it. The europen GA16DE is only 100HP and is much slower than my moded DS so there is no need for a compete swap!
you know who would more about this then anyone on these forums is Jim Wolf at JWT hes been workin on nissans for over 25 yrs, and has done some crazy stuff, and if he doesnt know what you should do, he WOULD know who does know whats up. so good luck.