Quote:
Originally Posted by Toyota00
We just got a 1981 3/4 ton GMC with a 454 in it. It has no cats on it, or smog equipment and down here in Las Vegas, Nevada it is required to be smogged.
I have been looking for engine diagrams and info, and can't seem to find too much.
My questions are
what is all the stock smog equipment that goes on a 454?
and where can I find it?
Thanks for any and all help!
O and what would be the best cats to put on it for a good price?
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In 1981 a heavy duty 3/4 ton,(C6HP package), would be in the "heavy duty emissions" category. This would include trucks of 8,500 gvw and above. If your truck was original with the BB it also would have a FF rear end. I don't recall them as being loaded with the emissions/catalytic converter package.