1970 L78 vs LS5 Valve Covers

[Dempsey]

Hi Guys,

I have a set of excellent original valve covers, which I want to positively identify. The story when I got them was that they were taken off a '70 Chevelle as a "Day-2" mod when almost new, and put away.
(Haven't cleaned them up - don't want to damage the sticker further).

The story checks out for condition, however on the factory code sticker on the passenger side rear, I can only make out what looks to be -RQ or -KQ. According to the BBC Suffix code info I can find, this could only be either CRQ or CKQ. (Looks like CKQ to me).
"CKQ" - '70 396/375 Chevelle or Nova.
"CRQ" - '70 LS-5 454.

Can anyone tell from the pics which ones they are? I believe that's the original breather elbow and hose.

Thanks - Len