Help, my exhaust is killing me.

The exhaust fumes are making me sick, and it is worse with the windows open.

My car is undrivable due to the fumes, and even letting it idle in the driveway is nauseating- in the house!

I have had my share of cars over the years, and the V8s are no Honda when it comes to exhaust fumes.
I have another car that is a turbo V6 that has 3 inch exhaust- it is not pleasant to sit behind it in a lawn chair, but I never even smell it in the car.

I drive it to the local store and I come home smelling like the pipes run directly into my shirt.

People who drive behind my car comment on the thick smell coming from the exhaust.

I have checked the entire system, the heat riser leaks a little, but everything else has been addressed.

I'm wondering if I should replace the entire exhaust system, but on the other hand it appears it is just a giant carbon monoxide pump and running pipes a few car lengths back wouldn't even help.

It has stock exhaust manifolds, and stock appearing pipes/mufflers, all the way out the back.

Here is what I have done so far:
1) replaced the manifold bolts and studs.
2) new gaskets.
3) new donut gaskets; manifold/pipe union.
4) changed some clamps that were loose.
5) replaced the trunk weatherstrip.
6) rebuilt the carb, and leaned it out as much as possible.

I really can't drive it anymore like this.