I have a cast iron intake manifold casting number 3872782 date code E116. It also has a large H cast just below the firing number. It does not come up on any if the casting number lists I have found. It looks identical to another 1966 intake with casting number 3872783 which shows to be for a 275HP 327. Can anyone shed some light on this?
Picture of the intake casting number? The H is for calling out its a Holley base over a Rochester/Carter base.
On closer examination I believe your right. What is the significance of the H under the firing order?
Looked on two Camero sites both listed it as '66-'67 A B X/327 w/o AIR Holley Service Replacement I believe Service Replacement means you could buy it at dealer parts counter if you wanted a square bore intake
I also have a Carter AVS tag 4028SA which shows to be for a 66 275HP 327. I fits both manifolds and I’m assuming it came from the factory on the manifold without the H.
It's the Chevrolet 'monkey see, monkey do' version of the modified Falcon that F*%d marketed. Just another wasted use of manufacturing resources! YOMV....... but you'd be wrong!
I keep finding your other thread on chevytalk. https://www.corvetteforum.com/forums/c1-and-c2-corvettes/3225441-intake-3872783-a.html 3872783 327 66-68 Truck, Cast Iron, Holley 3872783 327 66-67 300HP, Corvette, Cast Iron, Holley 3872783 327 66 275HP w/o A.I.R, Chevelle, Chevy II, Cast Iron, Holley I actually got out the books.