Chevy factory L-88 Intake 3885069 1967

[rally]

Guys do you know much about these 1967 L-88 intake manifolds? From the pics i have the factory cast these without a plenum divider, so it was bascially a factory single plane intake manifold. Anyone ever used one of these on a drag engine, bracket engine, stock eliminator motor? From what it says these were used on these L-88 67 Vettes for top engine horsepower and higher RPMs. This intake is completely different as far as later 68-69 L-88 ZL-1 intakes which had the plenum divider machined somewhat in the middle. I found pics also of Bill Grumpy Jenkins using this intake on his Super Stock 1967 Camaro 396 engine. It shows the plenum divider cast open. Any input on these rare intakes and perf is greatly appreciated.