Not following. The car 6.4 intake has the SRV module on the back of the intake that doesn't clear the firewall if the motor is in the stock location. And the truck 6.4 intake points up at an angle, but it does put the SRV module on the front of the motor so it does clear the firewall. So not sure what you mean by "for clearance".
I really need to since you have a stick. Maybe if you ran one of the late model auto's, you could keep the MDS if you really wanted to. You could probably disable it with a tune and leave the lifters and solenoids alone but I wouldn't.