LOTS of reading on those. MS has a stepper motor control for idle now in MS2. I "think" it can also trigger spark using the two crank position sensors in the stock dizzy - have to check the input signal to the ecu for compatibility.

Re the fuel rail, why fool with it? Look at the captive injector bungs on the SDS site, combined with whatever size hose you need for the flow you require, and junk the stock fuel rail, which, after your experience with it, should be a lot of fun. A Master E8000 fuel pump should cure that part, and looks like it will fit the stock fixture with minor mods.

Yank, you keep coming up with my best ideas. Any telepathy in your family???

Frank, remember that the 8.9 pistons have a higher dome height than the flat top 8.0TT pistons, and if that is still a problem, just use sohc24v heads, too, and get all that nice valve curtain area, the two headed injectors (to squirt at two intake valves) with their higher capacity, the huge intake and exhaust ports. The head is only slightly bigger than the sohc head, and I think all the dohc parts fit the outside, except of course the twin cam sprockets.