these may be a gay questions but i need to be sure so here goes:

are all d series pans compatible with eachother(and oil pickup too)
are all d series crank pulleys compatible with eachother

...

i think thats it for now, ill update as i remember the rest of my questions

 

the Y7/Y8 oil pans are diffrent from all the others and will not fit anything but a y7/y8 unless you use an oil pump from them