"What are the chances that a very rare Arlington built Chevelle would be an LS-6" 
Not so rare........
"and have survived the past 36 years with most of it's original paint," 
Ho hum........
"most of it's original interior" 
MOST? Where's the rest?
"protecto-plate" 
check!
"original title" 
no big deal,
"only accumulated 29,000 documented miles", OK, so you got me by 3K
,
"and be Tuxedo Black"
Sorry guys; sounds like a pretty "Average Car" to me!
(
Oh wait.... I already do!)