i like Greg's analogy

I have a 70 Hemi Challenger R/T SE - 59 made
It has a 4 speed - 22 made
It's EK2 ~ 22 x 7.5% = 1.65
Super Trak Pac ~ 1.65 x ~50% = 0.825
Black Top ~ 0.825 x ~60% = 0.495
Leather Interior ~ 0.496 x ~80% = 0.396

Technically my car doesn't exist - LOL

BTW - I know of at least 3 TX9 Hemi Challengers R/T SE