Car running rich?

[powerdyne 5.0]

So far I have put in a new 180* thremostat , autolite #24 spark plugs, msd cap and rotor, o2 sencor, air filter . It runs alot better, though it still feels rich. It will rip in fist gear then it dies out in second?? I was thinking I might have a leaky injector, sometimes I can smell fuel. And would a adj fuel regultor help, and where should I set it to on a s/c 9lb 5.0?? Thanks