Is there much difference between 1600 DP & 1500 SP

Just wondering whether there is much to be gained by upgrading My 1600 single port engine to a 1600 dual port engine...

using the same weber carburetor....

Lee

http://community.webshots.com/user/vw68autobug

well for the gain you would need a micro meter and than you would have to redo ya motor but if you go for a 1641 thats a differant kettel of fish
i have never seen a kettel of fish ops mind wondering