Booster Identification

[70 Challenger Lover]

Anyone know what model this booster is for? I picked it up dirt cheap thinking it was 70 E body but I'm starting to think it's something else? Pretty sure it's 70 though because of the diamond recess for the master cylinder.

[anlauto]

It's like nothing I've ever seen before, not E Body 100%, maybe C Body or truck ?

[70 Challenger Lover]

I'm leaning that way too. Maybe a 70s era C body. If so, that may be perfect. I'd like to get lots of boost without having to use one of the awful looking dual booster ones that stick way out into the engine bay.