For better drivability, replace M1 with Weiand from craigslist?

Let's start with a actual manifold vacuum reading..... Let's start with a vacuum guage reading... Around the corner ,from the fuel mixture screw. Thewe is a 3/16' vacuum nipple tube.Hopefully,it's covered. If not,that's one of the problems. Hook up the vacuum gauge,,get a reading . Let,s start there....