The mirror in my 79 K5 is 10" and I think it's the original one.
LMC has replacement mirrors in 3 different sizes and glue.
The OER mirror looks nice but is pricey.
Mirror glue kits should be available in auto part stores for cheap...
I prefer Precision, they seem to be softer and fit better. Working the lower corners in is bitch. Best is to grab a friend and some beer. Four hands make installation way easier.
Lube with soapy water or silicone spray and get it started with a flat blade screw driver on one end and and then it should slide in. If not work the sides in with the screw driver. Be careful not to poke thru the rubber with the screwdriver. Warming up the lower part of the bump stop helps a...
They are different in the depth and the orientation of the slot. When the motors changed also the arms changed. I ordered a new GM arm so that i have the ball thingi and the slotted part. I will use the crank arm of my k5 as template and fabricate one. The Nos pieces for trucks go for 40$ the...