How many using an A500 overdrive ?

Charrlie_S said
There are some differences. However you can swap the entire lockup trans and converter into a "A' body with a 1968 or newer slant six or small block. 1967 and older engines had the small converter hole in the crank, and the later converter/trans will not fit. The early lock up trans was controlled internally by hydraulic pressure only. The later ones (not sure what year) the lockup was controlled with hydraulic pressure controlled by a electrical solenoid inside the trans. If using the electrical controlled trans (has a extra electrical connector at the rear of the main case, near the tail housing) you need to supply 12 volts (I don't think it is 5 volts) to this terminal when wanting to lock up.

Just to add to this. The slant six never had a electrically controlled lockup (except maybe in a truck). That trans did not come out untill after the slant six was discontinued in cars (the electrical trans was not before 1988). I have a electrically controlled lock up V-8 904 trans, and a couple of slant six lockup transmissions. At some future date I am going to see if I can put all the V-8 guts (mechanical parts can swap, I don't know about the electrical parts) in the slant six case.