How much is it worth?

1966 PLYMOUTH BARRACUDA 273-180hp (8cyl-2V) AT
#4 #3 #2 #1
2dr Fstbk 5050 9800 13900 22400
Add:
273-235hp (8cyl-4V) 20%
4spd manual trans 10%
Air conditioning 10%
Formula S trim 10%
Deduct:
225-145hp (6cyl-1V) -15%
3spd manual transmission -3%