73’ 318 dies under accel with new intake & carb

I fought a 1411 for months trying to get it straight. I finally just kept upping the jet size and using a smaller and smaller metering rod until I was at the richest combo and it liked it.
I'm glad that worked out for you, but it is not a reasonable solution in my eyes. Something is making your A/F ratio way too lean. Seriously, going to the max jet/rod combo to make an engine happy means there is a serious vacuum leak somewhere that you're trying to cover up.