Vintage 180-Degree SBC Headers from IROC Series
 

Looks like Stahl pattern, and who knows what they would fit, but they look to be well built. I would love to build a set of 180-degree headers for one of my Camaros....

Link to 180-Degree Vintage Headers

https://i.ebayimg.com/images/g/WNoAA...9X/s-l1600.jpg

the sound is hard to describe. perfect harmony.

Great sound -- made the SBC whine, whine, whine ...

Spread port headers. Unless the rules stated they were allowed to use adapters for the exhaust side of the cylinder heads, they wouldn't be legal. I also don't think there was a cylinder head in 1970 capable of taking the spread port style header? Honestly they almost look like round port Pontiac, however, the angle of the header flange wouldn't work on a Pontiac.