Diplomat parts on an A body?

John I'm not sure the spring perches on the Diplomat rearend would match up to your Cuda so even if the width is close enough to work you may go through quite a bit to make it work. It would probably be an 8-1/4 also. I don't think they used any thing else then. If the other 8-1/4 you mentioned is from an A-body it would be the wiser choice because the perches would work without any modifications and $150 is a decent price for a good rearend.

I'm not sure about the front suspension parts. Don't know the Diplomat stuff well enough. Sorry.

You might get more responses posting that question seperately in the suspension section.