How to check if they are worn?

[72timemachine]

Rebuilding my entire front suspension on my c10 because I am putting a 6.2 diesel mated to a th400/Gear Vendor which gives me 6 speeds. I am in it for the fuel economy so let's forego the obvious fact that it is not powerhouse.

So with the added weight on the front end some folks on here said I could/should only have to change the lower control arm, coil spring and possibly the outer tie rod end using ones from a 3/4 ton or 1 ton truck.

Is it still ok to use the 1/2 ton upper control arm in combination with the 3/4 or 1 ton components?

How do you check for wear on the dog bones (in attached photo)?

I already have a Dana 3/4 ton rear axle in the truck. I understand this is only a 1/2 ton platform so I am not going to do anything out of bounds with the truck to damage the frame.

Thank you ahead of time for any help.