Just as slow as before mods..

Agree 100% No reason to pile on the guy.

I would love to see how this car ran at just idle.
Disconnect all the linkage.
Set the correct A/F ratio.
Set the initial timming between 12-14
Let it warm up, and give it a couple raps at the carb, and see what it does.

More than likely its something simple.
Carb pump nozzel clogged. (Not getting gas)
Bad plug wire.
Vacuum leak.
Incorect timing.
Something simple, but if you don't have a lot of knowledge, it can be frustrating.