I anticipated the same engineering skill level we have all come to love from past events, and they did not disappoint.

Examples (in Muscle class):
302 - ENGINE BLOCK:
No deck height or gasket thickness restrictions

305 - CYLINDER HEADS:
Valve seat location in the chamber (offset to the OEM port CL) appears to be optional

311 - AIR FILTER: Heat shields or plates between the intake manifold and carburetor prohibited
How about OEM shields with part numbers? How about my own "base gasket"?

314 - INTAKE MANIFOLD: porting permitted
You can join manifold runner pairs, and hollow the entire interior into a giant box

318 - ROCKER ARMS: Must be commercially available
For what engine?

321 - OIL PAN/SCRAPER: Modification and/or alteration of the as-manufactured oil pan prohibited. Crank scrapers and/or windage trays permitted.
Kaase (and Smokey, who is watching this from his eternal rest) reads this as "all pan modifications must be attached to the 6" thick windage tray", etc.

There's more, but it just turns my stomach.