Some of the very early Challengers equipped with the 340 came with flat hoods and V-8 emblems.
The A66 Challenger package was not immediately available and was not finalized as an option and formally available until early September, 1969. Please note the 7/23/69 memo listed below!
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From Hamtramk Historical:
Hamtramck - Historical is your friend.
per the '70 Dodge "salesman's pocket guide" 9/23/69 version:
CODE A66 - Challenger 340 CID engine package -
$258.90
NA Special Edition (29), NA R/T (JS)
15" Rallye wheels (W21) - required
at EXTRA cost
collapsable spare (W34) - required
at EXTRA cost
this changed at some point - as the following shows
per the '70 Dodge "dealership data book" no date found (around late October/early November)
CODE A66 - Challenger 340 CID engine package - includes
340 engine - E55
F70-14 RWL tires - T87
R/T hood
H.D. brakes
H.D. suspension
"bumble bee" stripe
"scat pack" decals
wheel lip mouldings "DELETED"
7/23/69:
The 340 Performance Package (A66) will be available on the hardtop and convertible models in conjunction with the 340 engine in early September. The 340 engine will only be available in combination with the 340 Performance Package.
10/20/69:
Effective immediately, F70x14-inch RWL tires (T87) are standard with the 340 Performance Package. The E60x15-inch tires (U82) will be optional at extra cost. The Collapsible Spare (W34) and Rallye Wheels will no longer be required with the 340 Package. A Rear Spoiler in Dull Black (J81) will be available in early November. Effective immediately, Performance Axle Packages A31 and A36 are available with the 340 Package.
2/12/70:
Longitudinal Tape Stripes on the Challenger high-Iine models (JH23, JH27, JH29) will be available in mid-March as an extra-cost option. Color availability and codes are: Black (V6X), White (V6W), Red (V6R), Green (V6F) and Blue (V6B). This tape stripe will be similar to the standard R/T stripe but without the R/T nomenclature. This stripe is a no-extra-cost option with the 340 Performance Package (A66).
4/13/70:
The Shaker Hood is now available on the Challenger R/T with the 440-6V and 426 engines. In addition, this hood is also available with the 340 Performance Package (A66) and will be available on the 383 and 440-4V engines on R/T models in late April. The Challenger T/A Fiberglass Hood (N94) is now available on all Challenger models with 4-barrel engines.
Paul Goldsmith tested an early Challenger 340 car with a factory flat hood sometime in August 1969, with the article printed in the December 1969 issue of Popular Mechanics. The test car clearly had the V-8 emblems.
Not sure how many 340 cars were produced prior to the introduction of the A66 package in early September 1969 but some would have had the v-8 emblem.