74 to 70 Dart parts swap

I checked the data tag info and there was nothing about the rear. Here are pics of what I have coming out of the 73. And pic of the progress of tear down.
Thank you

I'll search the web to see the way to identify the 8.25 verse the 8.75.

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It's simple. The 8.75 has no removable rear cover, the 8.25 does. That looks to be a 8.25