Waterneck or Throttle incorrect??

[Oregonjam]

I have Part # 387660 on a waterneck installed on a 1968 350 ss.
The assembly manual shows a throttle return spring going back to a bracket attached to the coil holder.

However the water neck has a tab with a hole in it for what looks like a spring attachment location that I am not using.

Do I have the wrong water neck or is the throttle spring run the wrong way?
Or did GM not use the tab in certain applications.

Any help is appreciated.

[JohnZ]

That 660 thermostat housing was used on many applications that didn't use the hole in the tab; my '67 Corvette and '69 Z/28 also use it, and neither uses the tab.

[Oregonjam]

John- Awesome. Thanks for the feedback. I was sure I had the throttle correct for the application but that tab always made me wonder.

Cheers,
John