[bouncytruck]

Welcome to the board from the pacific northwest.

The differences between '71 & '72 are fairly minor. There was a minor grill change, but most people don't notice the difference, including me. There was a change to the pattern on the seats and they added an extra support to the door due to some splitting issues.

Most repop parts are based on the '72 because it was the highest production run of all the first gen blazers.

CST is "CUSTOM SPORT TRUCK". It is a trim level package. Generally considered to be the more desireable Blazer. They had some extra shiny stuff as makovai mentioned. Most, but not all, had AC. There are some non CST rigs out there with more options, but not many. CST also had "woodgrain" on the side moldings.

If your looking to buy a rig, depending on the condition, there are certain areas that can be common "problem" areas to watch for.

Rocker Boxes - structural support under the body below the doors. These are common rust areas and until recently, reproduction parts were not available. They are still a pain to replace from what I've heard

Windshield frame - these get rusty and finding a solid one can be difficult.

door pilars - rust issues

rear pilars by the tailgate - yup, more rust