Don,
My VE powered 1989 bus has a new OEM lift pump and it's operating in a similar manner. The new lift pump provides 3 psi at idle and WOT. If it was not working properly the LP wouldn't keep up. The VE is tweaked just a bit and it's using the H1C @ 27 psi boost. Had it had the piston style lift pump I'd be seeing about 9 to 12 psi fuel pressure.
I don't know your exact numbers. However the piston pump will serve your needs well especially should you turn the power up on that old VE.
BTW guys,,,did you know that the Bosch VE is designed to serve "low power automotive needs" ?????
GL