I know this is a 1st. gen site , but here goes.... My 69 vert has a 70-455 with "15" heads from a "B" body.... The intake has a 3 port vac. switch on the intake...with top to bottom marks...1 D 2... I assume D is dist. ,but where should the other vac hoses go....I have a q-jet with a pipe and hose leaving the driver side front with a plug...should this be on 1 or 2 with man. vac. hose on the other ?