Anyone run high-flow Cats to reduce hydrocarbon exhaust smell?

While I would not run a cat unless leagally bound......

I did have to run cats on my Magnum many years ago when N.Y. State decided to up the anti and follow the standards set by California. Our cars were subject to a rolling dyno to prove it was good even at Hwy. speeds.

Even though my '79, 360 engine was stock except the Federal-Mogal 625 emmisions leagally carb, MSD6A, and dual exhaust off the exhaust manifolds, it was dual exhaust with an H pipe. Twin high flow cats were employed.

The whole exhaust system was custom bent and 2-1/4 inch stem to stern. I do forget where the cats were by. But the exhaust smell did clean up. Proper jetting and the car passed. Later, the MSD was added later and it really helped a lot. Dropping emissions even more while picking up mileage. Not so much in power.

How big is your cam and what is the engines compression?what carb are you running and its jetting? Step up springs/power valve?