I am working on a 1946 Chevy Pickup truck that currently has a 1954 Chevy 235 installed. I am trying to determine what to do with a vacuum port attached to the exhaust manifold and another line coming out of the head (see photos). Can I block off the vacuum port and seal up the hole in the head? Also does anyone now if someone makes throttle linkage for a conversion like this? I have seen a couple of discussions on line about customizing the existing linkage. Any help would be greatly appreciated.