Never heard of that, I have noticed in assembly manuals lots of RPO's were sometimes cancelled.
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1967 2dr Biscayne. L36, M40, G80, K05, F41. #'s. 1967 Impala convert. 283, glide. Parked in the garage since 74 and hasn't moved. Soon to be BB 4speed.
No, not that one, but I've seen a few pages tonight with CANCELLED written on them.
I didn't look at the Chevelle assembly manual tonight but my favourite one I saw in there one other time is under the 67 Chevelle, there's a big block tri-power Holley setup pictured with a big CANCELLED across 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