Originally Posted by Gojira94

I'm running a pair of Random Technology 100 cell / in. race cats. They made the fuel smell disappear as well as made the inspector happy. In NC we don't do emissions testing for pre-OBDII cars, we just have to retain factory emissions equipment, though most LT1s can get away with no AIR or EGR on the visual. That being said, Random Tech's catalyst materials are quality metals, work very well and make the cats fairly expensive (platinum, rhodium, palladium, etc.). Expect about $200.00 each. You'll probably want to run a pair of 200 or maybe 300 cell per inch cats. Give them a call. I talked to them and found them to be very helpful when I made my decision. I'll bet they have a customer or two that has passed TX sniffers with a similar setup to yours and can tell you what you'd need to pass, preserving maximum power...

AND... metallic substrate is what you want, not ceramic. A pair of Magnaflow 300 cell/ in. at $95.00 each may end up being your solution. They don't flow as good as RT cats but would work for you.