The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - IA 1973

**kidatheart** · 12-18-2019, 08:18 PM

I need some education. What is different after 78 that these only work on 78 and older. I haven’t replaced too many of these. Thank you.

12-18-2019, 08:18 PM	#3
kidatheart Senior Member Join Date: May 2012 Location: Assaria, Ks Posts: 465	Re: 1973 - 1978 GM Matched lock set I need some education. What is different after 78 that these only work on 78 and older. I haven’t replaced too many of these. Thank you.