Factory BB valve cover?

[3X24SPD]

Does anyone recognize this DS BBC valve cover with the booster dimple?
It looks like a factory cover, but I don't recall ever seeing any Corvette or Camaro that needed that clearance.

[Too Many Projects]

1967 Chevelle used a dimple because the brake booster was increased from 9" in '66 to 11" in '67, BUT, that looks much bigger than factory ??

[WILMASBOYL78]

Looks like it was 'customized'...:smirk:

[67since67]

'67 Chevelle, may have been slightly "enhanced"? Compare to the attached.
What is the engine??

[67ssmn]

67 impala

[3X24SPD]

Thanks guys. Much appreciated!

https://www.ebay.com/itm/283653597025

[sixt9rsx33]

I know a 67 Corvette with PB had a dimple. That is what it looks like to me in the picture.

[jeffschevelle]

Likely a reproduction, because the rear plug wire stand is straight. Originals have a dog-leg in the rear plug wire stand on that side (which you can see in Bill's picture and the Ebay pictures you linked). Crane repros have the dog-leg, but all other repros do not.