I have a 78' 350 custom that i been playing around with, well just recently I installed a new intake manifold and carburetor. Its on a 351m by the way. Everything has gone smoothly expect hook up the vacuum lines, They are everywhere! i don't know what lines i need and don't anymore. i just need it put simply. Its a performer 600 edlebrock carb non egr. Pictures would be helpful if you have them. i have searched the site but it will not let me look at archived threads. Thanks, ill add a picture.

 

 

Those pics are fantastic, if your vacuum lines were outside your rig or attached to your thumb. Take the photos of the vacuum ports you may have in question. Most of these guys can tell you where they go in their sleep. I had a vacuum leak not too long ago and it was in a spot you would never guess, the little plastic 90 that goes into the brake booster. It's a $2 part at napa so look at switching that too. Seriously though, take photos of what you need help with, these guys are great!