https://www.ebay.com/itm/Weber-Fits-Datsun-240Z-260Z-280Z-Triple-45-Bologna-Used-With-Cannon-Intake/153688501474?hash=item23c88c6ce2%3Ag%3ACMAAAOSwT59dqNT~&LH_ItemCondition=4

It's not a bad price if you had use for 45's

they look like 40 dcoe 27 not 45s

One is a 27 and the other two are 18's. Someone took a matched pair and added a third.

It kind of looks like the shepards hook has been welded to the linkage, maybe they wanted to eliminate the slop.

Pardon my Weber-ignorance, but what's the difference between a '27' and an '18'?

Differences can be in body casting and possible changes to machining and components. Here are some of the key items that can change:

1. progression hole size, quantity, location

2. throttle plate angle

3. accelerator pump excursion

probably others that I am forgetting.

 

For triple applications, it is important that all 3 carbs are the same.