use the TP valve lever and the gear selector lever from the trans in your car along with the speedo gear/housing.

that keeps the linkage correct for the car and speedo correct.

85 truck may or may not have the lock-up trans,you tell by the input shaft on them.

your 72 904 would be non lock up,the 78 904 maybe non lock up

lock up =better MPG

non lock up = more perfomance



splines to the end are non-lock up

1.5" smooth end on tip of input is a lock up

the TC between the 2 do not mix.