THere are several manufactuers of manual valve bodies. Look at www.summitracing.com and/or www.jegs.com to find the most common ones.
yes it still works the same on a automatic car that is turbo, as it does on a manual, it works off the waste gate not the tranny
yes
A turbo 400 is an automatic transmission, so yes, it will shift itself, unless someone has put in a manual valve body or transmission brake -- both of which are mainly used by racers.
A fully manual valve body in an automatic will need to be shifted manually ( no clutch ) May not be available for your application .
buy a Jake brake kit from banks or something
You can't make it a true manual, but you can either change the valve body (the brain of the non-pcm auto) over for an aftermarket full manual valve body. There are also a few good shift kits which will provide adequate results.
yes you can put a blow off valve on any turbo application, A blow off valve helps relieve boost pressure spike/surge when the throttle is quickly closed, helps prevent damage/excessive load on the turbo and throttle body.
Valve clearance
automatic recirculation valve
What is the valve clearance for a Nissan PF6 turbo diesel engine?
Ther is no egr valve on the 2.2 turbo engines. With FI and turbo, there was no need. Some of the earlier carb engines did have egr.
Valve Clarence 407 n engine