[Jaydee]

Thanks guys.
Yes it is Graham West that's advising me on the cats I need to make it pass. I'm using a Impco 425 mixer on a four barrel adapter straight on the manifold. With the long air cleaner it's hard to tell that it's running on LPG. The exhaust joins into one pipe only 150 mm from the engine, and the cat Is between the guard and the foot well, then does a 90 into a 1,2 meter hot dog. My engineer doesn't see a problem with gas. Hopefully it''ll pass with the right cats on it. They are actually smaller then the ones I was using before.
JD