454 Mechanical fuel pump

[Sixball]

I’m posting this here because my 454 came out of a late 70’s to early 80’s truck. I now have it in my 94 SWB. It’c carburated with the use of a regulator and electric fuel pump. Long story short, it caught fire and left me stranded. Where it was a Guy said he could fix it, I had planned to switch to a mechanical fuel pump “when I had time” but I figured this guy could do it and save me the tow $$. The motor has the pump block off plate. I bought the rod and pump, but he says it won’t work? All the videos I have seen, it’s straight forward. Are there any years where mechanical pumps won’t work? It’s still stuck there so I can’t confirm myself. He’s got it kinda rigged up with a ton of fuel line and I’m not happy with 8 feet of fuel line running under the hood.