Actually you could have a power lock (clutch type) in any of the three cases 741,742,489. Later on the cone type became the norm, they actually worked really well but would show fatigue earlier on. I used to buy brand new o.e.m units for 119.95 from I think it was mazzolini back in the early mid 80’s. These were cone style in the Chrysler box…,Swing’
