Looking at the chart I'm not real sure what they are telling me.

what are the differences in the:

"Flat Face Cowl - 3602"
"Windshield Cowl - 3612"
"Cab Chassis - 3603"
"Pick Up Truck - 3604"

this is the chart I'm using...and yes I tried the search on topics, but didn't find any explanation that I could find...at least with the terms I used...

http://chevy.oldcarmanualproject.com/chevyresto/52056.html

Thanks in advance

Hank Flowers
Cut and Shoot Texas
1952 3/4 Ton 3600
http://flic.kr/p/8RQvKZ