Re: Notice anything wrong here? (eBay auction)
 

For what these parts are selling for today,I for one am glad you brought these details up.
When did this Vertical casting ridge first appear on assembly line carburetors?
Pic from auction #1.
https://www.yenko.net/attachments/200373-carbguy1.jpg

Re: Notice anything wrong here? (eBay auction)
 

Rick;

I'm not 100% certain exactly when the casting ridge appeared on the 3310 carbs. I've seen 1967 dated 3310's that had the ridges, but I've not seen any 1966 dated ones to compare with.

Re: Notice anything wrong here? (eBay auction)
 

HI WHAT IS THIS CARB OFF

Re: Notice anything wrong here? (eBay auction)
 

Rick and Eric:
The change from the smooth choke horn to the vertical rib version was sometime in '66. I've never seen nor heard of a real 65 3310 with a date earlier than 1965.

The carb pictured with the "4" date is just one a a zillion service replacement over-the-counter 3310s and is, of course, 1974 dated.
https://www.yenko.net/ubbthreads/imag...s/rolleyes.gif

I don't know that it is an intentional fake as it has the later float bowls (the unique to 65,66 3310, 3130 and 3124s small inlet bowls have been reproduced). Anyone willing to pay a couple grand for a real, early 3310, etc., knows this isn't it.......(I hope!). Thanks, Eric, for pointing it out!
Dave

Re: Notice anything wrong here? (eBay auction)
 

"The carb pictured with the "4" date is just one a a zillion service replacement over-the-counter 3310s and is, of course, 1974 dated."

I agree about the 453 date being to early for an assembly line Z-16,but I thought they stopped using the three digit date code system after Dec. 1972.
Making this a 1964 model year date,if indeed authentic.. https://www.yenko.net/ubbthreads/imag...mlins/hmmm.gif

Re: Notice anything wrong here? (eBay auction)
 

Dave;

Here is a 733 dated 3310 that does not have the vertical ribs. I *believe* I've seen late `67 dated ones that had the ribs, but I wouldn't say with 100% certainty at this point.

At least now we know that the rib apparently still wasn't present on early `67 dated carbs.

As far as being `74 dated, AFAIK all Holley's after sometime around 1972 went to the 4-digit Julian dating system, so it would *appear* that someone's either fudged those #'s, or it's a pretty unique mis-stamp. (treading cautuiously with my statements here)

Just trying to do my job and keep someone from getting stuck with something that's not quite what they thought it was.

Eric

Re: Notice anything wrong here? (eBay auction)
 

I don't know the story behind these holley 3310 "EH" carbs but it makes me wonder because the first time I found one at a swap meet I nearly fell over(I'm not confusing it with the holley"3310/780 cfm" over the counter aftermarket carb).Since then I've found 2 or 3 of them and seen several on ebay.They only made 201 Z16's,where did all these "EH" GM carbs come from?

Re: Notice anything wrong here? (eBay auction)
 

Steve;

The EH 3310 is the grand-daddy of the modern 3310, and was caried out as a "service carb" for many years after the Z16 Chevelles ceased production before being "refined" into the more common 3310's we're so familiar with today.

Over the years, Holley has made about a bazillion of them...fact is, they're one of the best, most versatile carbs Holley ever produced. The current versions available today are (IMO) a less appealing version with their secondary metering plate and straight leg boosters.

FWIW, other OEM carbs have made their way to the speed shop counters simply because they worked so well and were so versatile. The 1850 is another example.

Eric

Re: Notice anything wrong here? (eBay auction)
 

Oops, forgot about the date code difference. That made the explanation too easy, I guess. IF some funny business happened with that date, he chose the wrong year and month. May of 64 IS a problem.
Looks like you have the style change date pinned down better the me, Eric. Are you keeping a file of photos, I hope?