73’ 318 dies under accel with new intake & carb

Professor,
Where does the OP say his engine is 'bone stock'?
IN GENERAL, if switching to manifold vacuum helps, then there's other issues with your timing and/or advance that need to be addressed. I'm NOT gonna sit here and start a pissing match with you. It's a vacuum hose. He moves it and it helps, or it doesn't and he moves on. I'm done.