Good info.
Compiling data, it seems the pumps can provide fuel & changes of pressure fairly quick. Regarding the alcohol content, unless you do a drastic change (switch 93 to E85), I don't see a huge difference in placing the sensor. Do agree based on research/ data by others, a bypass isn't need unless big power/ very high fuel flow is being made.
Pressure sensor placement seems to have a slightly different impact depending on placement. As Carl mentioned, there wasn't a huge difference in pressure between the front & rear placements. I would say the injector pulsing would have a greater effect. That being said, I'm thinking of running this fellow:
http://www.radiumauto.com/Fuel-Pulse...Kits-P751.aspx
or
https://www.ebay.com/itm/TAARKS-Fuel...-/192917450409
..up on the firewall with the pressure sensor . This will solve the pulsing issue, pressure sensor mount issue as well as a place to run the hard line to and continue with flex house to the engine.
The radium uses MAP to adjust pressure. Looks like that is for boosted applications. For the LT1 w/ fuel pres module, I would leave the port to atmosphere?
If the above needs revising, I'm here to learn.