1968 BB 3X2 intake

[John C.]

I found this intake with the numerous parts for the original L68 block from the Corvette I'm working on. I know it's not the original from the date code, It has 12.13.67 cast in the underside and the number 4256 is cast directly below the date. I was curious if it appears to be the proper configuration for a 3199850. The mark is stamped on what appears to be a flat pad that used to contain a cast number so I suspect it is a fake that was acquired at a swap meet somewhere. I seem to remember reading on the forum about some verified manifolds that had stamps instead of cast numbers so who knows? The rear carb flange is 4 1/4 " above the surface that mounts to the block and the front carb flange is 2 3/4" above the block surface. That would tilt the breather up in the rear. Is that correct?
John

[Joe L.]

Re: 1968 BB 3X2 intake

I found this intake with the numerous parts for the original L68 block from the Corvette I'm working on. I know it's not the original from the date code, It has 12.13.67 cast in the underside and the number 4256 is cast directly below the date. I was curious if it appears to be the proper configuration for a 3199850. The mark is stamped on what appears to be a flat pad that used to contain a cast number so I suspect it is a fake that was acquired at a swap meet somewhere. I seem to remember reading on the forum about some verified manifolds that had stamps instead of cast numbers so who knows? The rear carb flange is 4 1/4 " above the surface that mounts to the block and the front carb flange is 2 3/4" above the block surface. That would tilt the breather up in the rear. Is that correct?
John

John------


I have no doubt this is an original GM #3919850 manifold. This manifold was used for early 1968 L-68's and the date code you found is entirely consistent with that. Why some GM aluminum manifolds had stamped-in part numbers rather than the usual cast-in, I do not know. However, this is seen quite regularly.

The difference in height of the carb mount flanges that you described is exactly how these manifolds were designed.

[John C.]

Re: 1968 BB 3X2 intake

Thanks Joe. I'm sure this isn't the original intake since the build date is Oct 67 but it's nice to know that if I invest in the carbs it will fit OK.
John