I just picked-up a 'new' Holley 850-VS list-80531 > it comes out of the box with (4.5 primary) and (3.5 secondary)
The carb I'm taking-off is a Holley 850 DP list-9380(annular) with the rear PV blocked, and jetted-up.
Question > should I assume the vacuum signals from the 850/DP and the new 850/VS will be the same or, do I have to hook-up a vacuum gauge again with the VS/850 and take cruise/wot readings all over again???
Reason I ask > I would like to simply move the primary PV used in the 'DP' over to the new 'VS' 850.
As for the secondary side, I may or may-not plug and jet-up...don't know yet.
One last thing > this 'new' 850vs has brass floats > run'em or install the plastic floats?
Thanks for and feedback, Ray