TF performance goodies

Good to know. I just pulled apart a 904 from behind a '75 360 and it has a 4 pinion rear planetary and a 5 clutch front drum. I would presume they would be more desireable than a 3 pinion and 4 clutch, correct? Do you need to use the whole pump assembly or just part of it with that front drum? Do all 999's have the low gear set? If not, can you tell which ones do without pulling the trans apart?
Thanks, Mark