difference in nissan heads

[bangers]

whats the differences between a rb25det and rb26dett head? is there that much difference to matter?

[mag]

whats the differences between a rb25det and rb26dett head? is there that much difference to matter?

Have a look here. this may help..

http://en.wikipedia.org/wiki/Nissan_RB_engine#RB25

[bangers]

that doesn't tell me the differences in the heads. i need to know what cc they are and if the cams and valves are different. i imagine the cams and valves are different but was wondering if anyone knows for sure.