Originally Posted by Bill-E-BoB
hey guys, hate to revive an old post but I figured it made more sense than starting a new one up...that carb from ebay came in the mail & it looks like everything should be good but I have a question on installing it...
Vacuum lines...with the old Carter carb, the distributor vac advance connected to a small port on the front of the carb, the PCV connected to a big port on the front, and the brake booster connected to a big port on the back. The Holley doesn't have the same vacuum ports though. Just a small vacuum port down by the mounting flange, a small port on the front bowl & a big port by the rear bowl...so what goes where?
You can run the PCV to the large rear port, and see which of the small ports gives you the type vacuum you want for the vac. adv. I'm remembering the one on the base plate as being the manifold vac., the one up on the metering block is the ported source.
For the P/B, you can use a port plumbed to the intake itself.