I am rebuilding a q-jet I picked up earlier this week and have a couple questions. 1. There is what looks like a fuel line coming off the base plate on the back of the carb opposite of the fuel filter. What is this for and how can I block it off? 2. I need to hook up vac advance and pcv, these are all I have other than the brake booster which is an obvious port. Which ports do I need to use for these two things? 3. What jetting do I need to use. I would like to start with the factory 454 settings. The current jets are 77 with 51M primaries and DP secondaries. How would this setting fair, will it work or should I change it. 4. It has an electric choke with one hookup that is a large odd shaped blade terminal. How do I hook this up? Thanks for all your help!