NADA allows you to put in options that didn't exist. For example, I can see these printouts for my 74 Barracuda with a 440. Is that how they mean it? I'm sure it does raise the value, when it had a 318 before, but does anybody know, is that intended? For example:
Muscle Car
1974 Plymouth Barracuda 2 Door Hardtop
Original MSRP: $3,067
Low Retail Average Retail High Retail
Base Price
$7,350 $15,200 $29,300
Options
440/275 HP 4bbl V8 Engine 20%
TOTAL PRICE
$8,820 $18,240* $35,160