Door question

[saulgoode]

I thought truck and blazer doors were pretty much the same just cut down.
But, I read this on another thread:

You could make a truck door a blazer door but you would be better off using the re-inforcing pieces from a blazer door and putting them on the truck door. Cut the window piece off and you can make it work. Blazer doors have extra reinforcement in them to make it support the tub weight better.

Anybody know where the re-inforcing pieces are, or what they look like, I've never seen them. Also do they make that much of an improvement in strength.

Thanks,
Cody