Hmmmm.....Wonder why the Ford guys fill in their ports. :poke:
one of the biggest reasons to fill a port is the port is to big for most applications. For a quick example let’s take the 351 Cleveland and 426 Hemi for an example. Have you ever seen a stock one that could hold it’s on on the street. I ate them for lunch back in the 1970’s and 1980’s on the street and strip. Now if the would know the proper place to slightly fill those ports with epoxy you could probably run much better.