[chappyman66]

The HRS chassis is designed to have the posts on the chassis snap into the little pockets that get glued into the side of the body (or vice versa, depends on version)   Basically, it's sort of like pin tubes for Lexan bodies but without penetration of the body.

However, you can cut those off and use normal body posts if desired.   If really depends on the width of the body you are using.