Or has industry support for it:
The Sneeky Pete was designed as a true "Cheater Kit". This kit will enable you to obtain that extra tenth of a second without being obvious. It will be necessary to jet the carburetors a little richer (over and above what is normal, since you will have to compensate for the nitrous from the...
www.holley.com
That particular kit has been around since the mid 80's. It wasn't a cataloged item then. HRM did a story on the NOS factory and had a small picture of it but no explanation. I was able to puzzle out the part number on the cardboard backer and had a friend at a speed shop call them and inquire since it wasn't listed anywhere. Since the cat was out of the bag with the picture they told him it was a "Sneeky Pete" and made for hidden use with a slightly rich fuel system. I bought one just for the novelty of it but never used it, just a curiosity for the garage.