Can somebody tell me what this intake manifold is off of? it's either:

3331067
or
3831067

the date code is I278

And it's a Quadrajet manifold.

Thanks, Lance

How about 3931067?
1969 396/325,350hp and 427/390hp
I278=Sept 27th 68

Rene
66_Malibu

Thanks Rene

Lance