Brake rotors plus other items for a 75 Valiant

Dodge Vans, that explains why these hub/rotor units weigh so damn much talk about unsprung weight. Today I went back to exchange the undersized by .015" NIB from Venezuela rotor at Napa for a matching higher quality rotor. I now have a matching set by same manufacture and thickness.
This scares me now as a friend with a 89 3/4 ton Dodge van driving empty 100% has gone thru three rotors that warped even after turning one once.
This ain't no Porsche or BMW braking system i'm finding out. Fun with the
"Ply-Mouth" people are calling this new vehicle ownership project.
Chebbie, Dodge, Chrysler, Rambler, Javelin and now Ford all of the 60's era had them all. I miss the cherry 66 Chrysler 300 it was mint the lady was 87 when it was given to me. The "Banana Boat".