Motor dies when gas pedal pressed

I would start with spark plugs.
Acc pump may need adjusting.
A “new” carb may or may not be the end all to the problem.
I put a rebuilt on my 318 and it never ran so bad. I ended up overhauling my original and it took some work to get it where i was happy with it.
You need a manual to get it dialed in,accellerator pump, choke and power valve all have specific settings that need to be very close.
It may be just dirt/residue clogging the jets and could be fixed easily with a right proper cleaning.