Thanks Guys!
Yes, i have a kirban Adj F/P reg, C&L 76mm MAF, I swapped in the correct sampling tube as well for 24's. The car idles better, has more pep up top as well. Feels all around better. The 19's seemed a bit restrictive with H/C/I, liek it was starving for fuel a bit. No more pinging i noticed.
Let me ask you guys though, I set it at 39 vac line off, when i put the vac line on it sits @ 32PSI vac line attached on the gauge idling. Does this sound about normal/right?
Normaly is would sit at about 35psi with the vac hooked up. Main thing is the make sure the Fuel pressure is hits the 39-40 psi mark during WOT and heavy load. Only way to do this is monitor the gauge while driving. You should be fine though.
But to answer your question, yes, it perfectly normal for the Pressure to drop once the vacuum line is hooked up.