[bigblock73]

Frank, do you have a 70's truck right now with Rally's on it? If so, can you take a close look to confirm what type of center you have?

I am starting to wonder if GM changed designs at some point, say the 80's sometime...or perhaps in 88. Perhaps do to brake component and/or axle redesign or size changes.

I think a couple of these might be off the 90 'burb the more I think about it.