how does the carburator affect no power after idle and start up, not getting into 1st gear, engine dies,

fuel pump seems to inject gas, but i am guessing, also fuse is good.
new starter
new voltage reg
rebuilt carb 3 months now, worked fine for 2/5 months.
new spark plug wires
new fuel filter
new cap
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thinking it might be a bad
fuel relay
electric fuel pump
bad float
bad vacuum
bad year
bad catalytic converter

not sure a damaged car can be really tuned up but if you have any suggestons beside junking it please let me know.

thanks,