Howdy,
Well, I went ahead and re-referenced the PV to a manifold source under the carb body. I just used the original timed/vac port that the metering block already had. What I did was to jb-weld the original source/hole in the PV cavity, and the one in the carb base used for the timed/vac port. Then got out the roto-zip and trenched out @ 1/2"long x 1/8"deep line, in the metering block from the original timed port passage just passed where the edge of PV cavity is. That's done.
Now I am restricting the IFR's (idle feed restrictors) w/ a 0.008" aluminum wire (single strand of 18 gauge speaker wire) and I have drilled and tapped (10-32 UNF) the IAB's (idle air bleeds) for removable bleeds. The stock size of the IFR's are 0.028" on a holley #7448 - 350cfm and the IAB's are 0.070". By restricting the IFR 0.008", I will have to compensate and also restrict the IAB (from 0.070" down to 0.054" (this is just a starting point)). All this, just to try and get better driving characteristics from the turbo engine. Lean at idle/cruise and light load, and then richen up during WOT.
I did try to make it run with only restricting the IFR's and not the IAB's, and it would not idle under 2000 rpm, even with the air/fuel mixture screws out 4 - 5 turns. So that proves it does work. Now once the airbleeds come in, that I ordered, I can get this carb the way it should be...hopefully. Let y'all know more later.
Kirk
ps. the reason I did not just put a wire in the IAB's to restrict them in the first place is because, I did this without my notes I remind you, I thought you had to drill/open up the IAB's while restricting the IFR's...well at least I did have a 10-32 UNF tap on hand.