I have researched it but i was just wanting to hear some info from people that had a rb20 in their z. I figured that a bone stock rb20 in a 280z will probably run around a high 13 to low 14 1/4 mile and one with a hx35 turbo,z32 afm,444cc rb26 injectors and a good engine management will be in the 12's. And for the transmission issue I will probably run a z32 30a with the rb25 bell housing if the 71c isn't up to the task.