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Old 08-26-2021, 11:53 PM
Joe's Garage Joe's Garage is offline
Chief Ponti-yacker
 
Join Date: Oct 2016
Location: Las Vega$, NV
Posts: 637
Default I think they were a combined option.

I'm pretty sure that the electric door locks got the seatback locks automatically.

I've got a buddy with a 4-speed 1970 GP that has them as an option - I'll see if he has PHS.