GM Total Information Package - Your Truck
 

If you take this string (without the quotes) and change the year to the year of your truck,

"http://www.gmheritagecenter.com/docs/gm-heritage-archive/vehicle-information-kits/Chevrolet-Trucks/1973-Chevrolet-Truck.pdf"

you will get all the info you could ever want to know.

Thanks to Keith Seymore, GM Full Size Truck Engineering

Re: GM Total Information Package - Your Truck
 

Browse around at the various ones available;
http://www.gmheritagecenter.com/gm-h...tion-kits.html

Re: GM Total Information Package - Your Truck
 

Best info yet on differences between my 78 Heavy Half and regular C-10- C-15. One thing it doesn't mention. Good post.

Re: GM Total Information Package - Your Truck
 

One thing it doesn't say, larger gas fill tube for regular gas nozzle. (guess I stopped in mid thought above until I run over and look at neighbors C-10 filler) There is tons of mis info re differences. Might make a page with FOR SURE, FACTUAL DIFFERENCES. When I counted only 34 teeth on ring gear I started investigating. Found out rear ends are 34-10 for 3.40 and 34-11 for 3.09. GMC Heavy Half-Chevy Big Ten.

Re: GM Total Information Package - Your Truck
 

Geeze, now I have to add: no such thing as 34-11/3.09