The SDL is 3 inches longer then the SD. All the room goes into the rear seat footwells. The power telescoping steering wheel didn't arrive until 86 with the Gen2 cars. No tilt wheel was ever offered. ABS was optional in 84, as was memory on the driver's seat. In 85 a driver's side airbag was optional.

I would image the telescoping column could be retrofitted, but I image it would be a lot of work. I don't know what is involved.

-Jason

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.