Carl I am not sure what the "special order" injectors are but if they are the 48LB that come with the Roe kit I would upgrade tp 69LB. You will be pushing around 11 PSI out of the Roe with the std 5.6 LB pulley and Stinker's 7" crank pulley.
If you are planning on wringing every horse the Roe is capable of you might consider dropping the MSD voltage increaser and going with JMB's total fuel system (2 in-tank pumps, larger fuel lines and larger fuel rails).
The MSD did help me but just barely. My pressure holds at 62 LBS till about 4500 RPM where it starts dropping to 55LBs by 5800 RPM. I was dropping to about 47LBs before adding the MSD.
Just a few suggestions from my experience with the Roe.
If you are planning on wringing every horse the Roe is capable of you might consider dropping the MSD voltage increaser and going with JMB's total fuel system (2 in-tank pumps, larger fuel lines and larger fuel rails).
The MSD did help me but just barely. My pressure holds at 62 LBS till about 4500 RPM where it starts dropping to 55LBs by 5800 RPM. I was dropping to about 47LBs before adding the MSD.
Just a few suggestions from my experience with the Roe.