1967-68 SS/C-D Hemi B-Body: Cold Air or Flat Hood?

DeuceCoupe · 07-14-2019, 08:51 PM

Well as if 427 Ford and 396 Chevy NHRA Factored Horsepower wasn't confusing enough, I'm realizing that not all B-Body SS/ SuperStock Hemis had cold air hoods.

I gather that ALL the Street Hemi's were factored to 480 hp from 1966-1970, maybe down to 455hp in 1971?

But then, there's the hoods. The 1967 RO23, WO23 cars all ran in the SS/C=7.00 class with cold air hoods.

But what about say Sox' 1967 GTX in SS/D=7.70? Cold air or flat hood?

What about the 1968 SS/D=7.70 B-Body Hemis? Which ones ran cold air vs a flat hood, and did that affect the 480hp factor? It seems like if you could run cold air "for free" (no factoring), then who wouldn't? Unless NHRA didn't allow it.

A lot of funny rules affected the cold-air vs flat-hood 427 Fairlanes so this is why I'm asking about the 1967-68 B-Body Mopar Hemis.

Math!
Thanks for the help and memories.

07-14-2019, 08:51 PM	#1
DeuceCoupe Member Join Date: Feb 2016 Posts: 267 Likes: 96 Liked 45 Times in 41 Posts	1967-68 SS/C-D Hemi B-Body: Cold Air or Flat Hood? Well as if 427 Ford and 396 Chevy NHRA Factored Horsepower wasn't confusing enough, I'm realizing that not all B-Body SS/ SuperStock Hemis had cold air hoods. I gather that ALL the Street Hemi's were factored to 480 hp from 1966-1970, maybe down to 455hp in 1971? But then, there's the hoods. The 1967 RO23, WO23 cars all ran in the SS/C=7.00 class with cold air hoods. But what about say Sox' 1967 GTX in SS/D=7.70? Cold air or flat hood? What about the 1968 SS/D=7.70 B-Body Hemis? Which ones ran cold air vs a flat hood, and did that affect the 480hp factor? It seems like if you could run cold air "for free" (no factoring), then who wouldn't? Unless NHRA didn't allow it. A lot of funny rules affected the cold-air vs flat-hood 427 Fairlanes so this is why I'm asking about the 1967-68 B-Body Mopar Hemis. Math! Thanks for the help and memories.