87 Mustang 5.0 Running Rich And Seems To Buck In 4th And 5th Gear

Hey Everyone, so I have an issue with my 87 Mustang here is what is done to the vehicle.

347ci Stroker Motor
Full Roller
Edelbrock Aluminum Heads
Bored and Forged bottom End
Holly Injection
Trickflow throttle body
Mishimoto Aluminum Radiator with Dual electric fans
New tremec 5 speed
Flowmaster exhaust with x pipe

Now the issue that I am having is my vehicle is running rich, I dont necessarily smell it while I am driving but when I park it in my garage (with the door open) the garage starts to smell like gas, and then my clothes smell. Also when I get into 4th gear and I am cruising she seems to buck a little bit around 40mph, 5th gear bucks alot more unless I have my foot in the pedal and I am going at least 60mph. I am thinking I can check the O2 sensors as well as chek my exhaust for leaks, it does seem like someone tried to patch the exhaust at some point but it is after the mufflers, as the mufflers are in the middle of the vehicle and then the pipes go to the back.
This is only my second project car so I am still pretty new to this, so any advice would be helpful.
 
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welcome.

DId you remove the smog equipment, charcoal cannister? What size injectors are you running. What is your fuel pressure. who tuned the car., do you have an exhuast leak.

Lastly run the codes.
 
Holley injection? Do you have a Holley computer & wiring harness?

Stock computer was an A9L located under the passenger side kick panel.