Tech Question: overflow/catch can

[BonzoHansen]

Old cars (like a 69 camaro) didn't come with catch cans/overflow tanks. For test & tune runs on an otherwise stock car is there a requirement to have a catch can? I figure there is but I wanted to verify.

[sweetbmxrider]

-All cars must have a catch can for radiator overflow of at least 1 pint. These must be securely fastened (bolted or clamped). Factory overflow in most late-models is fine.

09 rulebook

[WildBillyT]

Originally Posted by NHRA Rules

All cars in competition with any type of water overflow capable of spilling water must have a catch-can to accumulate the excess liquids and not leak onto the track. Minimum catch-can capacity: 1 pint (.47 l). Catch-can must be securely fastened; i.e. bolted, clamped. Overflow may be routed into headers on cars that are supercharged or burn nitromethane or methanol.

My Nova did not have one originally, but had one retrofitted from when it used to do track duty if that helps.