Its Time To Build Some BOOST!
Now all I need to know is the purpose of these extensions and where they vent to; your picture just shows them ending in ambient air, and I know that's not right.
OK bill first I'd change the brpv ref point to the rear of the carb hat were the flow of the charge will follow the contour of the carb hat. And that's were your going to receive your best signal.
Vent tube extention are easy to make and all you need is a piece of 5/16 brakeline about three feet long and cut it into two pieces and cut and bend to fit like this
You will need to pull the short vent tubes out and us some epoxy resin to set the new ones into place
Now all I need to know is the purpose of these extensions and where they vent to; your picture just shows them ending in ambient air, and I know that's not right.