I have a slight problem(I think). I am about to swap my B18C1 head for a B16 head(w/JUN stage 3 cams, valvesprings and retainers). It seems the B16a head has some different cooling lines than my GSR head. What do I need to do to get this thing to bolt up correctly? Or would I be better off just swapping out the cams, valvesprings and retainers, but putting the JUN parts in the GSR head?