Lol gotta be honest that's kinda on you for trusting a "universal" part with a machine that old. Those Erie 28s are ancient history, of course modern parts won't just bolt right on. You're basically trying to fit a square peg in a round hole and then getting mad when it doesn't work. Should have just hunted for the real part or gotten a machinist to make an adapter.
My buddy's 1963 Bridgeport needed a new feed screw last year. We ended up having a local shop make a custom bushing for about eighty bucks. Sometimes the old stuff just needs a little extra help to fit right, you know?