The Stovebolt Site Forums The Parking Lot '60-'66 Trucks Need opinion's for better Revs

I have a 64GMC 3/4 ton with a dana 60 rear end.It had 411 gears in it when I got it, I had 353 put in and it drive much better at hwy speeds now.to find what kind of rear end you have look in a summit catalog,there you will see a differential case reference guide.Then take the cover off and the gearing should be stamped into the ring gear.