Dave, I can't prove that it's right but it sure looks right so let's do it. If not, I think I know of a Nova owner who can use it for an original L78 car so it won't go to waste!
I'm on here about 24 1/2 - 7 actually!!! I have no life...
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
When I bought my 66 4 speed GP he gave me a bunch of used parts he had changed over the years. I think there was 3 heat riser valves. None seized but he said after a while they started to rattle and it annoyed him so much he would change it!
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)