help needed with 904

J par, you'll find that very common in auto transmissions.... different ratio's, clutch packs, etc. etc. in 904's, 727's, 4 cylinder tranny's and of all makes and manufactures. And not just tranny's, but torque converters as well. How many times in the old days did we say "that 318 in that Duster is faster than my 318 in my Duster," when in fact one could have had better gearing in the tranny, and a couple of more hundred rpm's in the stall. And this would lead one to believe that car "A" has a spunkier motor than car "B".