Originally Posted by email@example.com
Hi guys, I have a sbc that i just converted from ported to manifold vacuum on the vacuum advance. Just trying to see if the truck runs better but so far not seeing much of a difference. In fact it may run worse now. What do you guys think about the two?
This has been covered in quite a bit of detail. The problem is, there's no one correct answer for all applications.
You can find more info on this here
, as well as doing a search on this (and other) forums.