302 V8 vacuum diagram.
First good luck with the project.
As for vacuum - pretty simple.
The large port (tube) should run a line to the PVC valve
probably located in the pass valve cover.
The little port on the pass side of the carb (near mixture screw) should
run to the distributor vacuum advance unit. The section of the carb where
the mixture screws are is called the metering block.
You will have a port under the fuel bowl. (The front of the carb)
That port should be capped.
That's it. - -
The only time you use other vac sources is a smog motors.
Just so you know - - the power brake booster (if equipped) gets it's vac
from a line at the rear of the intake.
You should be goof to go.