kevin.......can you have a look at my post on your link above about the ZL2 aircleaners please
thanks
im looking to buy one on e bay and need the info ;)

I'm back, over in GMC land for a while. Looks like Mark got all your answers. Are you all set?

No......LOL
so you agree with mark on all points? [ you are the reigning expert on ZL2 induction now you know smile.gif ]

do you know why the 70 chevelle has the flat spot on the seal ring?

and your opinion on why the original has a 90 degree bend in the pipe vs the 2 45's on the repro.
the stock carb is a single pump vac sec....

I agree with Mark on all counts.

I do not have a 70 Chevelle, but the pics I have seen the notch is on the pass side and kinda looks like piping or trans vac line is on that side. But that is just a guess from pics.

The 90 bend is very similar to the bend on vapor return lines for 2bbl cars, maybe GM just reused the tooling.

I feel the 2 45s on the repro were based on the cowl not fitting on non stock dbl pumpers. The repro co. did not want to make a part that could not be used by a larger customer base, so they modified the part to fit on all carbs. my .02 anyway.

I have an original 70 LS6 in my garage, I can take pictures of the cowl cleaner on that if you want.

thanks kevin

sure jonesy a pic would be nice.

The 69 Camaro flange did not have the flat cut on the passenger side. It was sort of egg shaped on that side.