I'm looking to find out what vacume lines go to were I have 72 big block,PVC,holly 750 carb,w/a vacume resivor for the brakes,and every thing was gone when I got the car,any help would be very appericated:D

The factory setup had the PCV to the carb (that would be the big outlet at the rear of your Holley). Vacuum advance would go to the carb also (upper port on metering block for ported vacuum, lower port below for manifold vacuum. Everything else (PB,A/C, auto trans) was from a fitting in the intake with as many ports as needed for the number of options.

thanks for the help,one more thing is theira perfered side for the pvc and oil breather

I think that the pcv is on the pass side near the back for a shorter run to the vac source and staying away from the brake booster and such