Cm870 built with CM 570 internals.

[tree98]

Why in the world would you want to put 570 parts in an 870? Why not just build the 870 properly? Also your running a bad delete, I know your going to disagree with this but two turbos and two heads is a telltale sign your running an engine destroying tune.eventually you will see the light if you do the right things suggested on this forum. First and foremost have your program looked at by Rawze, Unilevers, or mommaburt.
And why would you care about "eating a cat's lunch" get yourself reliable equipment that you can make a living with and let the cat's and all the rest blow past you like the ignorant a holes getting 3 MPG. Why do you want a dual oil cooler housing? Is your oil temp to high? That would be another symptom of a bad delete.