by David O' » 13 Wed Sep, 2006 4:32 pm
The heads, intake manifold and the size of the carburetor. The carb is smaller on the single port, but the manifold doesn't require boots. Horsepower with the single is about 3 hp less than the dual port! That's it!
If at first you don't succeed, beat the pshaw out of the business partner, and then go at it alone! LOL!