From Chevelle Stuff website...

1966 Chevelle RPO Production Numbers/MSRP

M20 4-speed wide-range transmission (SS396)
283 or 327 engine
(13680 - 01/07 - L35) 73,022 $105.35
$184.35
$188.30

M21 4-speed close-ratio transmission - available with L79, L34, and L78 engines. 5,012 $105.35
M22 4-speed close-ratio transmission 12


There were none reported in 1967...

there are a number of items that are incorrect just under the hood of that car. Not picking at it but for that price it should be right

I agree I like this car a lot but the devils in the details, locks on all exhaust ports are wrong, air cleaner is for a 68 because it has the dent for the smog pump and why with all the deletes would they have ordered horse power robbing power steering, trans crossmember looks gray, get those darn notched belts off of it. All easy fixes, but at the asking price they get in the way on a car this cool.

Shouldn't have the ground straps on the firewall if it came without a radio. Also, shouldn't have the rubber between the gas tank straps. It's a tough thing to make a cowl plenum air cleaner fit and line up correctly on a big block car as Doug Perry can attest with YS760 so kudos for that. Brooks Chevrolet also got a 4.88 gear, no radio/no heater '67 Z-28 which they drag raced. It was at MCACN a few years back in the barn finds section.

TT
 

Its trim tag.

Is that trim tag real? Looks a little questionable to me.

The font on the top of the tag looks sort of "fat" to me, but I'm not an expert. Neat looking car for sure

Fluffed beyond fluffed

The lettering on the tag itself looks fairly original, but the info stamping looks very poor quality. The W on the fourth line is barely readable, as is the 4 below it. Can an original tag be pressed flat and restamped ? That's almost what it seems like ?

The font is way different than my LOS car but NOR could've used different font since the machine stamping the tags would've been different