Spring installed height, 1.75 on BBC?

Is the installed height of the valve springs 1.75 for a BBC? I finally got some springs for my engine but don't know what the correct installed height is for them! Any help would be cool, thanks.
-Jesse

 

1.875

as I recall....

(looked it up, yeah, 1.88)

 

Was there any difference between years or are they all the same?
-Jesse

 

the ones with rotators (later model trucks mostly) had some funkiness....what heads do you have?

 

The casting # is 14081045, what are they??
-Jesse

 

Those are the later truck 454 heads, 78-87 style, the only spec I have is the 1981 truck manual that says 1-51/64" installed height.

But check the specs that came with the springs....usually hot rod springs want to be installed at 1.88

 

Shit I got the wrong springs! And they were dual's too. Thanks for the help, I'm just glad I didn't try them on for size.
-Jesse