A factory service manual is going to be your best bet, but if you have a factory 2bbl, I can go out and look on my car and tell you where most of it goes.
You may also want to take some pictures of what you have under the hood and post them.
I know the routing of the BBD Carter carbs pretty well on most years and applications.
There could also be a couple of other sources of vacuum leaks, even if your hoses are routed properly, like the condition of the hoses and ends, themselves, the PCV valve, brake booster hose, the booster itself or the hose to booster fitting and grommet seal (if equipped), etc.
